Feinstein experienced a shingles diagnosis early in 2023, which led to a prolonged absence from the Senate. This absence raised questions about her ability to fulfill her duties and prompted calls for her resignation.

As her health issues persisted, numerous individuals and organizations called for Feinstein to resign from the Senate, citing concerns about her fitness to serve and the impact of her absence on important legislation.

Dianne Feinstein passed away on September 29, 2023, in Washington, D.C., at the age of 90. Her death marked the end of a long and impactful career in public service.