Donald Trump's second and current tenure as the president of the United States began upon his inauguration as the 47th president on January 20, 2025. Trump, a member of the Republican Party, had previously served as the 45th president from 2017 to 2021 and lost to Joe Biden of the Democratic Party in the 2020 presidential election.

In the 2024 election, former president Trump defeated the Democratic nominee Vice President Kamala Harris, winning all 7 swing states.

The Republican Party also currently holds majorities in the House of Representatives and the Senate during the 119th U.S. Congress following the 2024 elections, thereby attaining an overall federal government trifecta.

In the first eight months of his second presidency, Trump signed over 200 executive orders, many of which have been or are being challenged in court. His attempts to expand presidential power and conflict with the courts have been described as a defining characteristic of his second presidency. The Trump administration has taken action against law firms for challenging Trump policies. On immigration, Trump signed the Laken Riley Act into law, revived numerous immigration laws from his first term, attempted to restrict birthright citizenship, and initiated procedures for mass deportations, including nationwide ICE raids. In January 2025, Trump launched the Department of Government Efficiency (DOGE) organization, with Elon Musk briefly overseeing it. DOGE is tasked with reducing federal spending, limiting bureaucracy, and has overseen mass layoffs of civil servants along with efforts to dismantle government agencies like the U.S. AID.

Trump has overseen a series of tariff increases and pauses, which has led to retaliatory tariffs from other countries. These tariff moves, particularly the "Liberation Day" tariffs, caused a brief stock market crash and subsequent market volatility. In international affairs, Trump has further strengthened U.S. relations with Israel. His administration aided Israel in the June 2025 Iran–Israel war and brokered a ceasefire between it and Iran. In early October, Trump's plan for a ceasefire between Hamas and Israel regarding Gaza was signed. It calls for a planned release of Israeli hostages and Palestinian prisoners. Amid the Russo-Ukrainian war that began in 2022, the Trump administration undertook multiple attempts at peace negotiations. As in his first presidency, Trump initiated the withdrawal of the U.S. from the World Health Organization, the Paris Climate Accords, and UNESCO.

His second administration has been criticized for its targeting of political opponents and civil society. Many of his administration's actions have been found by judges to be illegal and unconstitutional, and have been criticized as authoritarian and contributing to democratic backsliding. Trump is the second U.S. president to serve nonconsecutive terms and the first with a felony conviction. At 78 years old and seven months, he is the oldest person to become U.S. president. Following his electoral victories in 2016 and 2024, he is constitutionally ineligible from seeking further terms due to the Twenty-second Amendment to the U.S. Constitution, although many of his associates have discussed the possibility of him running for a third term.

Trump, who previously served as the 45th president of the United States from 2017 to 2021 and lost his reelection bid to Joe Biden in the 2020 presidential election, announced his candidacy for the nomination of the Republican Party in the 2024 presidential election on November 15, 2022. In March 2024, Trump secured the Republican nomination. Trump selected Senator JD Vance of Ohio, a former critic of his, as his running mate, and the two were officially nominated at the 2024 Republican National Convention. On July 13, Trump was the victim of an attempted assassination during a campaign rally in Butler, Pennsylvania.

Early on November 6, 2024, the day after the election, Trump was projected to have secured the presidency. Trump won the presidential election with 312 electoral votes, while Kamala Harris received 226. Trump, upon taking office, became the second president in U.S. history to serve non-consecutive terms after Grover Cleveland in 1893, the oldest individual to assume the presidency, and the first with a felony to serve the presidency after his conviction in May 2024. Vance, as the third-youngest vice president in U.S. history, became the first millennial vice president. In the concurrent congressional elections, Republicans secured a government trifecta after retaining their majority in the House of Representatives and winning back control of the Senate.