Though she was a proud native of one of the most famously liberal cities in the country, Feinstein earned a reputation over the years in the Senate as someone eager to work across the aisle with Republicans, and at times sparked pushback and criticism from progressives.

“I truly believe that there is a center in the political spectrum that is the best place to run something when you have a very diverse community. America is diverse; we are not all one people. We are many different colors, religions, backgrounds, education levels, all of it,” she told CNN in 2017.

biography from Feinstein’s Senate office states that her notable achievements include “the enactment of the federal Assault Weapons Ban in 1994, a law that prohibited the sale, manufacture and import of military-style assault weapons” (the ban has since lapsed), and the influential 2014 torture report, a comprehensive “six-year review of the CIA’s detention and interrogation program,” which brought to light for the first time many details from the George W. Bush-era program.

Feinstein and Sen. Richard Blumenthal of Connecticut, hold a news conference in the Capitol on Wednesday, October 4, 2017.
Feinstein and Sen. Richard Blumenthal of Connecticut, hold a news conference in the Capitol on Wednesday, October 4, 2017. (Bill Clark/CQ-Roll Call, Inc./Getty Images)

Feinstein’s high-profile Senate career made its mark on pop culture when she was portrayed by actress Annette Bening in the 2019 film “The Report,” which tackled the subject of the CIA’s use of torture after the Sept. 11 attacks and the effort to make those practices public.

In November 2020, Feinstein announced that she would step down from the top Democratic spot on the Senate Judiciary Committee the following year in the wake of sharp criticism from liberal activists over her handling of the hearings for then-President Donald Trump’s Supreme Court nominee Amy Coney Barrett.

While Democratic senators could not block Barrett’s nomination in the Republican-led Senate on their own, liberal activists were angry when Feinstein undermined Democrats’ relentless attempt to portray the process as illegitimate when she praised then-Judiciary Chairman and South Carolina Republican Lindsey Graham’s leadership of it.

Feinstein said at the time that she would continue to serve as a senior Democrat on the Judiciary, Intelligence, Appropriations, and Rules and Administration panels, working on priorities like gun safety, criminal justice and immigration.

CNN’s Lauren Fox, Haley Talbot, Manu Raju and Shania Shelton contributed to this report.