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Colin Kahl
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Colin Kahl
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Colin Hackett Kahl is an American political scientist who served as under secretary of defense for policy in the Biden administration from April 28, 2021, to July 17, 2023. Previously, he served as national security advisor to the vice president under then-Vice President Joe Biden (2014–2017).[1] After the Obama administration, Kahl served as a Steven C. Házy Senior Fellow at the Center for International Security and Cooperation (CISAC) at Stanford University.[2][3][4][5] Since January 2026, Kahl is the Director of Stanford’s Freeman Spogli Institute (FSI) for International Studies, which includes CISAC.[6]

Key Information

In the Obama administration, Kahl was involved in the negotiations of the Joint Comprehensive Plan of Action, commonly known as the Iran nuclear deal. After leaving the administration, he was subject to disinformation campaigns, as well as private intelligence investigations by former Trump administration staff that targeted him, his wife and children.

Early life and education

[edit]

Kahl was born in Michigan[citation needed] but moved to the San Francisco Bay Area with his mother and brother in 1981. He was raised in Richmond, California.[7] He graduated from John F. Kennedy High School in 1989.[8] Kahl earned a BA in political science from the University of Michigan in 1993 and a PhD in political science from Columbia University in 2000.[9] Under his advisors Robert Jervis and Jack Snyder, Kahl's doctoral thesis was entitled States, Scarcity, and Civil Strife in the Developing World [Kenya].[10]

Career

[edit]

From 1997 to 1998, he was a national security fellow at Harvard University. From 2005 to 2006, he was a Council on Foreign Relations International Affairs Fellow, working on stability operations policy at the Department of Defense.[11] He has been a professor at the University of Minnesota. Kahl has published in leading security studies journals, such as International Security and Security Studies, as well as Foreign Affairs.[12][13][14]

Obama Administration

[edit]

From 2009 to 2011, he was the deputy assistant secretary of defense for the Middle East in the Obama administration.[15] In 2011, he was awarded the Secretary of Defense Medal for Outstanding Public Service by Secretary of Defense Robert Gates.[15] In 2014, he became National Security Advisor to then-Vice President Joe Biden.[16] In the Obama administration, Kahl was directly involved in negotiating the Iran Nuclear Deal, as well as publicly advocating for it.[17][18]

In May 2018, it was revealed that aides to U.S. President Donald Trump had contracted with the Israeli private intelligence firm Black Cube to find evidence to support unsubstantiated and false claims that Kahl was being enriched by Iran lobbyists and that either he or deputy national security advisor Ben Rhodes were cheating on their wives.[19][20][21][22][23]

Biden Administration

[edit]

In November 2020, Kahl was named a member of the Joe Biden presidential transition Agency Review Team to support transition efforts related to the National Security Council.[24]

Kahl was nominated by Biden to serve as the under secretary of defense for policy. His nomination was subject to controversy in the Senate, with the Republican caucus unanimously opposing his confirmation due to his support for the Iran nuclear deal, as well as for his criticisms of Trump administration policies.[25][26] In 2021, 18 Republican United States Senators including Ted Cruz (R-Texas), Bill Hagerty (R-TN) and Tom Cotton (R-AR), alleged that Kahl might have publicly disclosed classified or sensitive national security information on social media, and demanded an FBI investigation.[27] Experts [who?] on classification told Politico the Republican accusations against Kahl appeared to be politically motivated, asserting that the tweets did not appear to constitute a violation.[28][29]

On March 4, 2021, the Senate's Armed Forces Committee held hearings on Kahl's nomination. The committee deadlocked on the nomination on March 24, 2021, therefore delaying his confirmation. The entire Senate voted to discharge Kahl's nomination from the committee in a 50–50 roll call vote; Vice President Kamala Harris was needed to break the tie.[30] On April 27, 2021, Kahl was confirmed by a vote of 49–45, thanks in part to the absence of several Republican senators.[31][4] He was sworn in the following day by Secretary of Defense Lloyd Austin.[32]

In May 2023 it became known that Kahl would return to his role as a professor at Stanford University after being granted a two-year leave of absence.[33]

In April 2024, Kahl joined the Truman National Security Project's board of directors.[34]

Kahl was a member of the Defense Policy Board Advisory Committee.[35] It was disbanded in April 2025.

Publications

[edit]

Books

[edit]
  • States, Scarcity, and Civil Strife in the Developing World, Princeton, N.J.; Woodstock: Princeton University Press, 2008. ISBN 9780691138350, OCLC 231587048
  • Colin H. Kahl and Thomas J. Wright, Aftershocks: pandemic politics and the end of the old international order, New York: St. Martin's Publishing Group, 2021. ISBN 978-1-250-27574-5, OCLC 1227086712

References

[edit]
[edit]
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Colin Kahl

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Colin H. Kahl is an American political scientist specializing in and Middle East policy, who held senior roles in the U.S. Department of Defense under the Obama and Biden administrations. From April 2021 to July 2023, Kahl served as Under Secretary of Defense for Policy, advising the Secretary of Defense on strategy, force structure, and international partnerships while overseeing the department's policy development and implementation. Earlier, during the Obama administration, he acted as Assistant to the President and Advisor to from October 2014 to January 2017, and previously as Assistant Secretary of Defense for the , where he contributed to counter-ISIS strategy and regional stability efforts. Kahl's academic career includes positions as an associate professor at from 2007 to 2017 and his current role as the Steven C. Házy Senior Fellow at Stanford University's Center for International Security and Cooperation, where he focuses on U.S. , , and conflicts. He holds a Ph.D. in from (2000) and a B.A. from the (1993), with publications emphasizing empirical analysis of military interventions and deterrence. Kahl's nominations drew scrutiny from Republican senators over his involvement in the 2015 Iran nuclear deal negotiations and past social media posts criticizing former President Trump and GOP policies on and , which he described as sometimes disrespectful during his 2021 confirmation hearing. Critics, including Sen. Ted Cruz, accused him of bias against and partisan leakage, though Kahl was confirmed 49-46 along party lines and pledged impartial service.

Personal background

Early life and family

Colin Kahl was born in in 1971. He grew up in . Publicly available information on his family background and early influences remains limited, with no verified details on parental occupations or formative personal experiences prior to .

Education

Kahl received a degree in from the in 1993. He pursued graduate studies in and at , earning a Ph.D. in in 2000 under the supervision of and Jack Snyder. His doctoral dissertation, which examined the role of resource scarcity—particularly environmental factors—in precipitating civil strife in developing states, provided an early foundation for his research on the intersections of state weakness, demographic pressures, and . This work, later expanded into the 2006 book States, Scarcity, and Civil Strife in the Developing World published by , emphasized causal mechanisms linking scarcity-induced societal stresses to violence, challenging simplistic Malthusian narratives while incorporating institutional and political variables. Kahl's training under Jervis and Snyder, prominent scholars in realist , oriented his early academic focus toward security dilemmas, deterrence, and the structural drivers of instability rather than normative or idealist frameworks.

Academic and pre-government career

Academic appointments

Kahl served as Fellow at Harvard University's Institute for Strategic Studies from 1997 to 1998, where he conducted research on topics. He then held a Research Fellowship at Columbia University's Center for International Information Network from 1999 to 2000, focusing on interdisciplinary security-related data analysis. From September 2000 to May 2007, Kahl was in the Department of at the , teaching courses in and while producing peer-reviewed scholarship on topics such as post-9/11 military transformations and regional conflict dynamics. In July 2007, he joined Georgetown University's School of Foreign Service as Associate Professor in the Security Studies Program, a position he held until December 2017; during this tenure, interrupted by government service, he contributed empirical analyses of defense innovation, strategies, and Middle Eastern security challenges, including publications in journals like . Following his Georgetown role, Kahl joined in 2017 as Steven C. Házy Senior Fellow at the Center for International Security and Cooperation (CISAC) within the Freeman Spogli Institute for International Studies, also serving as Professor of by courtesy; he additionally acted as Social Science Co-Director of CISAC from August 2018 to April 2021, emphasizing research on , great-power competition, and U.S. defense policy through data-driven case studies and policy-oriented papers. These appointments established Kahl's academic reputation in , grounded in quantitative assessments of military effectiveness and conflict outcomes rather than normative advocacy.

Think tank roles and research focus

Kahl held the position of Senior Fellow and Director of the Security Program at the Center for a New American Security (CNAS) from 2009 to 2014, where he oversaw policy research on regional threats including Iran's nuclear ambitions and support for proxy militias such as and . In this role, his work emphasized causal factors driving Iran's strategic behavior, such as technological advances in uranium enrichment—reaching 20% purity by 2010—and the regime's use of proxies to extend influence while avoiding direct confrontation. A prominent output was the 2013 CNAS report If All Else Fails: The Challenges of Containing a Nuclear-Armed , co-authored with Raj Pattani and Jacob Stokes, which assessed the feasibility of post-acquisition deterrence through of 's incentive structures and historical precedents like Pakistan's nuclear-enabled proxy support in . The study highlighted elevated risks of miscalculation, arguing that a nuclear could shield proxy operations from retaliation, drawing on data from 's pre-nuclear developments and Hezbollah's 2006 war tactics to project heightened escalation probabilities. Kahl's research at CNAS also included the 2012 report Risk and Rivalry: Iran, Israel and the Bomb, which examined empirical patterns in 's covert nuclear pursuits and proxy arming, such as transfers of rockets to Gaza militants, to evaluate containment's vulnerabilities absent preventive measures. Post-2013 observations, including 's stockpile growth to over 5,000 kilograms of low-enriched uranium by 2023 despite sanctions and the proxies' sustained attacks on U.S. and i targets, underscored the report's cautions on deterrence's practical limits under asymmetric threat dynamics.

Government roles

Obama administration service

From October 2014 to January 2017, Colin Kahl served as Deputy Assistant to the President and Advisor to . In this position, he functioned as a senior advisor to both Biden and President on U.S. and issues, with a primary focus on the . Kahl contributed to the formulation and implementation of the (JCPOA), the 2015 multilateral agreement aimed at curbing 's nuclear program in exchange for sanctions . As part of the administration's negotiating team, he supported provisions requiring to reduce its operational centrifuges by two-thirds and shrink its low-enriched uranium stockpile to levels far below prior amounts, with (IAEA) verification as a compliance mechanism. The deal's structure tied phased sanctions to these empirical metrics, which initially met following implementation in January 2016. However, the agreement's sunset clauses—allowing phased resumption of restricted activities after 10–15 years—and 's subsequent violations after the U.S. withdrawal in May 2018 enabled to expand its enrichment capacity, stockpiling enough material for multiple weapons by 2023 and shortening its potential breakout time to as little as one month. These developments underscored limitations in the JCPOA's long-term enforceability, as 's advances outpaced the temporary constraints despite initial verifiable restraints. During his tenure, Kahl also played a role in shaping the Obama administration's counter-ISIS campaign, advising on the strategy to degrade and ultimately defeat the through an international of over 80 nations. This approach emphasized airstrikes, training and equipping local partners like Iraqi forces and Kurdish , and intelligence sharing, which contributed to ISIS losing approximately 95% of its territorial in and by 2017. Empirical outcomes included the recapture of key cities such as and in , facilitated by support. Nonetheless, the strategy's reliance on proxy forces without large-scale U.S. ground troops left gaps in threat neutralization, as ISIS retained insurgent capabilities, external attack networks, and ideological influence, enabling continued operations and recruitment beyond territorial losses. Regional drawdowns, including limits on U.S. troop commitments, prioritized burden-sharing but correlated with slower progress against ISIS affiliates in areas like Syria's Valley.

Biden administration service

Colin Kahl served as Under Secretary of Defense for Policy from April 28, 2021, to July 2023, acting as the principal advisor to Secretary of Defense on and defense policy matters. In this capacity, he oversaw the development of the 2022 National Defense Strategy, which prioritized great-power competition by designating as the "pacing challenge" and as an "acute threat," while introducing concepts like integrated deterrence to synchronize military and non-military tools across domains. Kahl played a central role in coordinating U.S. military assistance to following Russia's full-scale invasion in February 2022, including the authorization of multiple Presidential Drawdown Authorities totaling billions in equipment such as , HIMARS systems, and later cluster munitions to sustain Ukrainian forces. However, empirical assessments indicate that delays in delivering certain advanced systems in 2022, amid debates over escalation risks and U.S. stockpile concerns, correlated with Russian advances in , such as the capture of significant territory in before Western aid volumes scaled up sufficiently to shift momentum. In the , he advanced deterrence efforts through alliance enhancements, including leading negotiations for the pact announced in September 2021, which committed to nuclear-powered submarines to counter Chinese maritime expansion. Kahl's tenure concluded amid ongoing geopolitical pressures, with his departure announced on May 17, 2023, and effective in mid-July, coinciding with policy reviews on sustainment and posture amid persistent threats from authoritarian actors. While initiatives like bolstered allied capabilities, rising adversarial actions—such as China's military drills around and Houthi disruptions in the post-dating his exit—highlighted challenges in translating strategy into decisive deterrence outcomes.

Policy positions

Positions on Iran and nuclear issues

Kahl has consistently advocated for the (JCPOA), the 2015 nuclear agreement with , as a mechanism to constrain Tehran's nuclear capabilities, arguing it reduced operational centrifuges by two-thirds, shrank low-enriched stockpiles dramatically, and extended Iran's estimated breakout time—the period needed to produce enough for one —from two to three months to at least one year. However, empirical assessments indicate the JCPOA failed to prevent long-term advancements, as complied initially but, following the U.S. withdrawal in 2018, systematically breached limits, accumulating by 2023 a sufficient for multiple weapons if further enriched and reaching 60% purity—near the 90% threshold for weapons-grade material—while breakout time shrank to weeks. In critiquing the Trump administration's "maximum pressure" campaign of intensified sanctions post-JCPOA withdrawal, Kahl contended it backfired by hardening the ian regime, accelerating nuclear advances, and provoking escalatory proxy attacks without yielding a superior deal, preferring instead a return to the JCPOA as a baseline. Countervailing data shows sanctions reduced Iranian oil exports from approximately 2.5 million barrels per day pre-2018 to around 500,000 barrels per day by 2019, constraining regime revenues and arguably slowing covert nuclear work relative to the post-withdrawal breaches under reduced pressure, though evaded full compliance through and did not immediately pursue a full breakout. Kahl's writings on containment, particularly in his 2013 Center for a New American Security report If All Else Fails: The Challenges of Containing a Nuclear-Armed Iran, outline a "Five Ds" framework—deter, defend, disrupt, de-escalate, and denuclearize—to manage a nuclear Iran if prevention efforts fail, emphasizing extended deterrence for allies and disruption of destabilizing activities like proxy militias. He acknowledges risks, including a nuclear umbrella potentially emboldening Iranian proxies such as Hezbollah to act with reduced fear of retaliation, complicating crisis de-escalation amid Iran's asymmetric warfare tactics. Post-JCPOA realities underscore these challenges, as Iran expanded proxy operations—evident in heightened Hezbollah border activities and Houthi disruptions—without nuclear weapons, suggesting a latent arsenal would exacerbate deterrence credibility issues for U.S. commitments in the region.

Positions on Israel and Middle East conflicts

Kahl has endorsed policies ensuring 's qualitative military edge (QME), emphasizing U.S. commitments to provide with superior conventional capabilities over regional adversaries. During his tenure as Advisor to Biden, he contributed to arms sales and security assistance that maintained this edge, even amid negotiations with . In 2022 and 2023, as Under Secretary of Defense for Policy, Kahl reaffirmed these pledges in meetings with Israeli counterparts, discussing against shared threats. Critics have described Kahl's approach as dovish, citing his preference for diplomatic restraint over preemptive strikes against Iranian proxies such as and , which they argue permitted these groups' military buildups. In testimony and writings from his Obama-era roles, Kahl advocated calibrated responses to proxy threats, prioritizing de-escalation and multilateral pressure on rather than unilateral Israeli actions that risked broader escalation. This stance aligned with administration policies that, post-2015 nuclear deal, correlated with increased Iranian funding to proxies—'s arsenal grew to over 150,000 rockets by 2023, while expanded tunnel networks and weaponry, culminating in the , 2023, attack that killed 1,200 Israelis and took 250 hostages. Such outcomes have prompted assessments that U.S. restraint under these policies emboldened by signaling limited consequences for proxy aggression. Kahl's analysis of the Iran-Israel rivalry underscores mutual deterrence despite Tehran's threats, positing low deliberate nuclear risks but heightened potential for inadvertent escalation via proxies. In his 2012 Center for a New American Security report, he argued that Iranian leaders, including Supreme Leader Khamenei, exhibit rational behavior constrained by survival incentives, unlikely to pursue Israel's annihilation even if nuclear-armed, though proxy conflicts could trigger crises. Events since, including Iran's arming of and leading to cross-border attacks post-October 2023, have tested this framework, revealing how proxy emboldenment—facilitated by Iranian precision-guided munitions transfers—exploited perceived U.S. and Israeli hesitancy. Under Biden, Kahl helped advance U.S.- ties through integrated defense dialogues and aid packages exceeding $14 billion after , countering Iranian influence in and . Yet detractors contend his underemphasis on direct causation—between diplomatic forbearance and proxy gains—contributed to strategic miscalculations, as Iranian via allies persisted amid U.S. signals of non-intervention in proxy domains. Some retired Israeli officials have defended Kahl's record as professionally supportive of rights, countering charges of . Empirical patterns, however, indicate that policies favoring engagement over confrontation enabled proxy entrenchment, challenging assumptions of contained rivalry.

Positions on broader national security strategy

Kahl served as the principal architect of the Biden administration's 2022 National Defense Strategy (NDS), which emphasized integrated deterrence as the core approach to addressing strategic competition with —designated the "pacing challenge"—and as an acute threat, integrating military capabilities with alliances, , economic tools, and technology to raise adversaries' costs without direct conflict. This framework marked a deliberate pivot from the post-9/11 emphasis on and toward peer-level competition, reflecting empirical assessments that great-power revisionism posed greater long-term risks to U.S. interests than dispersed terrorist threats, while sustaining through lighter footprints. In line with the NDS, Kahl advocated strengthening alliances to mitigate U.S. overstretch, citing successes in burden-sharing such as European allies' defense expenditures rising from an average of 1.4% of GDP in 2014 to 2.02% by 2023, with 11 of 31 non-U.S. members meeting the 2% guideline by 2022—up from three in 2014—driven by responses to Russian aggression. He highlighted empirical gains from partnerships like (enhancing submarine capabilities) and the Quad (coordinated exercises and supply chain resilience), arguing these diffused risks without requiring indefinite U.S. unilateral commitments, though he stressed the need for defined victory conditions to avoid strategic diffusion amid multiple theaters. Regarding support for , Kahl viewed aid—totaling over $35 billion in security assistance by April 2023—as essential to degrade Russian capabilities and reinforce deterrence credibility against peer aggressors, but he acknowledged the "constant flow of weapons" strained U.S. stockpiles, necessitating hard choices on production ramp-ups and posing opportunity costs for broader readiness, including Pacific contingencies against . Despite these strains, he maintained that Ukraine assistance did not undermine the prioritization of , as bipartisan consensus and alliance integration preserved focus on the primary pacing threat.

Controversies and criticisms

Senate confirmation process

Kahl's nomination for Under Secretary of Defense for Policy faced significant Republican opposition during his March 4, 2021, confirmation hearing before the Armed Services Committee, where senators grilled him on past posts criticizing Israeli military actions and Republican lawmakers, as well as his advocacy for the (JCPOA). Kahl apologized early in the hearing for using "disrespectful" and "sometimes inflammatory" language in those tweets, attributing it to strong opposition to certain Trump administration policies, while pledging a professional approach to the role if confirmed. Testimony centered on Iran's nuclear program and sanctions, with Republicans expressing concerns that Kahl's JCPOA support indicated a willingness to prioritize over verification of compliance, potentially risking amid Iran's post-deal advancements in enrichment. Kahl affirmed he opposed lifting or terrorism-related sanctions without Iran first returning to verifiable JCPOA limits, emphasizing the need to address Iran's ballistic missiles and regional proxies alongside any nuclear restraints. These exchanges highlighted empirical debates over the JCPOA's track record, including Iran's violations after U.S. withdrawal, though Kahl maintained the deal had constrained Tehran's program during its implementation. The advanced Kahl's on March 24, 2021, via a 13-13 party-line tie vote, which under rules allowed progression despite the deadlock. The full confirmed him on , 2021, by a narrow 49-45 margin, also along partisan lines, with the vote tally influenced by absences among Republican senators. This outcome underscored deep divisions over Kahl's record, with critics arguing it reflected broader rifts on strategies prioritizing .

Policy critiques and perceived policy failures

Critics from conservative think tanks have argued that Kahl's longstanding advocacy for the Joint Comprehensive Plan of Action (JCPOA) facilitated Iran's attainment of nuclear threshold status by incorporating sunset clauses that permitted the resumption of advanced activities, such as unlimited centrifuge operations after 2024 and the lifting of core enrichment limits by 2030, thereby accelerating Tehran's capabilities beyond what maximum pressure sanctions—effective in temporarily stalling progress from 2018 to 2020—achieved. By February 2023, under policies aligned with Kahl's views, Iran's breakout time to produce sufficient fissile material for one nuclear weapon had contracted to about 12 days, a stark reduction from over a year during the JCPOA's implementation phase prior to the U.S. withdrawal. These analysts further contend that the deal's omission of constraints on Iran's ballistic missile program and its proxy militias enabled Tehran to divert sanctioned relief funds—estimated in the hundreds of billions—toward arming groups like Hezbollah and the Houthis, intensifying proxy conflicts rather than deterring them. In the , Kahl's influence on U.S. restraint-oriented strategies has drawn accusations of insufficiently prioritizing Israeli against Iran-backed threats, with empirical correlations between Biden-era hesitancy and escalations such as Houthi disruptions of shipping starting October 2023—requiring over 100 U.S. defensive strikes by mid-2024—and Hezbollah's daily rocket barrages exceeding 8,000 by September 2024, straining allied deterrence without decisive . Right-leaning assessments posit that this approach, echoing Kahl's earlier rather than prevention paradigm for Iran's nuclear ambitions, failed to learn from prior lapses like the unenforced Syrian chemical weapons "red line," thereby emboldening proxy aggression and prolonging regional instability. Perceived shortcomings extend to , where policies Kahl shaped contributed to an incomplete defeat of ; despite the territorial caliphate's collapse by 2019, the group's ideological persistence and operational remnants in and —manifesting in ISIS-K's capacity for external attacks assessed as viable within 6-12 months by 2021—underscore a failure to eradicate root threats, allowing resurgence amid power vacuums. On great-power competition, critiques highlight U.S. lags in key technologies under Biden's integrated deterrence framework, which Kahl helped formulate, as export controls proved faltering against China's self-sufficiency gains and AI investments surpassing $100 billion annually by 2024, with American policy undermined by inconsistent enforcement and overreliance on corporate incentives rather than robust state-led rivalry. While Kahl's role in assembling NATO-led coalitions that delivered over $100 billion in aid to by 2024 represents a tactical achievement in countering Russian , conservative evaluations weigh it against these evidentiary policy shortfalls, arguing they reflect a broader misprioritization of threats.

Publications and intellectual contributions

Books

Colin H. Kahl's primary solo-authored book, States, , and Civil Strife in the Developing World (, 2006), examines the role of demographic pressures and resource in precipitating internal conflicts. Drawing on quantitative data from over 100 developing countries between 1950 and 2001, Kahl employs statistical models to test hypotheses linking rapid , , and scarcities in , , and forests to civil strife, particularly when interacting with state capacity weaknesses. Case studies, including Pakistan's communal riots, the ' agrarian unrest, Kenya's ethnic clashes, and Rwanda's precursors, illustrate how these stressors exacerbate elite manipulation of narratives, though Kahl cautions against deterministic , emphasizing contingent political processes. The work's empirical rigor, grounded in cross-national regressions and process-tracing, has informed debates on climate-conflict linkages, with subsequent studies partially validating 's role in sub-Saharan African and Asian instability but refuting it as a primary driver in oil-rich or ideologically fueled cases like Syria's , where failures predominated. In co-authorship with Thomas Wright, Kahl contributed to Aftershocks: Pandemic Politics and the End of the Old International Order (St. Martin's Press, 2021), which analyzes the as a catalyst accelerating the decline of the post-Cold War liberal order. The book synthesizes real-time policy data from , including U.S. assessments and international response timelines, to argue that fragmented global coordination—evident in the WHO's delayed alerts on January 14, , and supply chain disruptions—exposed institutional frailties, intensified U.S.- rivalry, and empowered revisionist actors like . Historical analogies to the 1918 and interwar shifts underpin predictions of a multipolar era, with from trade data showing a 20% drop in global GDP in and rising protectionism. While praised for its granular chronicle of events like the U.S. travel ban on (January 31, ), critics note an underemphasis on domestic ideological polarization as a causal factor, with post-publication developments like the 2022 Ukraine invasion partially affirming rivalry escalations but challenging assumptions of inevitable U.S. retrenchment amid sustained alliances. The analysis influenced early Biden administration strategies on resilient s, though real-world validations remain mixed amid ongoing great-power competition.

Reports and articles

In 2012, Kahl co-authored the Center for a New American Security (CNAS) report Risk and Rivalry: , , and the Bomb, which contended that a nuclear-armed would pose heightened dangers to through emboldened conventional and proxy actions but that mutual deterrence could maintain rivalry stability, reducing the likelihood of deliberate nuclear use. The analysis influenced discussions on containment strategies, yet empirical developments, including 's escalation of proxy warfare via in from 2013 onward and Houthi attacks on starting in 2015, demonstrated persistent instability and indirect confrontations that strained the predicted equilibrium without invoking nuclear thresholds. Kahl's contributions to analyses and congressional testimonies, such as his 2013 statement to the House Foreign Affairs Committee, emphasized sanctions' role in inflicting economic hardship on , citing a contraction in Iran's GDP by approximately 6% in 2012 and inflation exceeding 30%, which pressured Tehran's nuclear ambitions. However, outcomes revealed mixed efficacy, as Iran mitigated impacts through evasion tactics like oil smuggling via ship-to-ship transfers and opaque with partners such as , sustaining regime finances and enabling continued proxy support despite policy aims to curb proliferation funding. In op-eds like "The Myth of a 'Better' Iran Deal" published in Foreign Policy in 2017, Kahl critiqued unilateral U.S. approaches to as inferior to multilateral frameworks like the JCPOA, arguing they failed to build sustainable pressure without allies. These views shaped defenses of negotiated restraints, but the JCPOA's erosion—marked by 's verified breaches starting in 2019, including uranium enrichment beyond 3.67% limits to levels approaching 60% as reported by the IAEA—highlighted breakdowns in compliance enforcement, undermining the deal's longevity amid reciprocal escalations following the U.S. withdrawal.

References

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  2. http://cisac.fsi.stanford.edu/people/colin-h-kahl
  3. https://www.fp4america.org/colin-kahl/
  4. https://politicalscience.stanford.edu/people/colin-kahl
  5. https://www.cnas.org/people/colin-h-kahl
  6. https://www.brookings.edu/people/colin-kahl/
  7. https://cisac.fsi.stanford.edu/taxonomy/term/317
  8. https://cisac.fsi.stanford.edu/events/iraq-past-present-future
  9. https://www.politico.com/news/2021/02/23/colin-kahl-senate-republican-pentagon-471268
  10. https://www.defensenews.com/congress/2021/03/04/republicans-slam-pentagon-nominee-colin-kahl-over-tweets-iran-nuclear-deal/
  11. https://www.cruz.senate.gov/newsroom/press-releases/sen-cruz-on-the-senate-floor-colin-kahl-and-145views-the-world-through-a-cracked-lens-and-146-and-145judgment-is-irreparably-marred-by-obsessive-animosity-toward-israel-and-146
  12. https://www.politico.com/news/2021/03/04/republicans-kahl-tweets-middle-east-policies-473656
  13. https://www.discoverthenetworks.org/individuals/colin-kahl/
  14. https://www.presidentialprayerteam.org/2023/01/26/dr-colin-h-kahl-under-secretary-of-defense-for-policy-3/
  15. https://obamawhitehouse.archives.gov/the-press-office/2014/09/26/vice-president-biden-announces-dr-colin-kahl-new-national-security-advis
  16. https://www.brookings.edu/wp-content/uploads/2016/06/FP_20230929_kahl_cv.pdf
  17. https://www.cambridge.org/core/journals/perspectives-on-politics/article/states-scarcity-and-civil-strife-in-the-developing-world/32B494CB345C369A6EF0B3582256A90C
  18. https://www.war.gov/About/Biographies/Biography/Article/2591842/dr-colin-h-kahl/
  19. https://s3.amazonaws.com/files.cnas.org/documents/CNAS_IfAllElseFails.pdf
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  21. https://www.files.ethz.ch/isn/165088/CNAS_IfAllElseFails.pdf
  22. https://www.files.ethz.ch/isn/144190/CNAS_RiskandRivalry_Kahl_0.pdf
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  24. https://www.armscontrol.org/blog/2012-04-10/kahl-kroenig-debate-timing-utility-iran-strike
  25. https://news.stanford.edu/stories/2021/01/biden-picks-colin-kahl-secretary-defense-policy
  26. https://www.timesofisrael.com/us-senate-confirms-colin-kahl-a-shaper-of-iran-deal-to-senior-defense-post/
  27. https://www.aei.org/op-eds/will-the-actions-of-bidens-iran-team-match-its-words/
  28. https://iranprimer.usip.org/index.php/blog/2021/jan/27/colin-kahl-iran
  29. https://www.cnn.com/2023/02/28/politics/kahl-iran-nuclear-deal
  30. https://www.armed-services.senate.gov/imo/media/doc/21-08_03-04-2021.pdf
  31. https://www.csis.org/analysis/current-military-operations-and-concept-forever-wars
  32. https://www.theatlantic.com/politics/archive/2014/09/obamas-isis-strategy-will-not-achieve-its-goals-security-insiders-say/458115/
  33. https://www.cnas.org/publications/reports/a-strategy-for-ending-the-syrian-civil-war
  34. https://www.war.gov/News/Releases/Release/Article/3398589/statement-by-secretary-of-defense-lloyd-j-austin-iii-on-the-upcoming-departure/
  35. https://policy.defense.gov/Portals/11/Documents/DPB_Docs/Kahl%2520DPB%2520Bio%25202024.pdf?ver=02g5SowPwFFotG7R2itz7A%253D%253D
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