Sen. Dianne Feinstein Dianne Emiel FeinsteinTrump plans to pick Amy Coney Barrett to replace Ginsburg on court Trump faces tricky choice on Supreme Court pick The Hill's Morning Report - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' MORE endorsed former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE for president Tuesday, making official what the California Democrat has been hinting at for months.

Feinstein, who served with Biden in the Senate for years, praised the former vice president, saying she’s had a first-person perspective of his political capabilities and specifically citing his support for gun control measures.

ADVERTISEMENT

“I’ve worked closely with Vice President Biden and I’ve seen firsthand his legislative ability, his statesmanship, and most importantly his moral fortitude,” Feinstein said in a statement Tuesday. “During his time in Congress and in the White House, Joe Biden has been a tireless fighter for hardworking American families.”

The California Democrat added that she believes Biden can “deliver real solutions” in a Congress “dominated by ideological polarization.”

The endorsement, which notably did not go to fellow California Sen. Kamala Harris Kamala HarrisTexas Democratic official urges Biden to visit state: 'I thought he had his own plane' The Hill's Campaign Report: Biden on Trump: 'He'll leave' l GOP laywers brush off Trump's election remarks l Obama's endorsements A game theorist's advice to President Trump on filling the Supreme Court seat MORE (D), is far from a surprise. Feinstein has released statements praising Biden for months and hosted a fundraiser for him at her San Francisco home last week.

But it comes amid uncertainty for Biden’s campaign as the former vice president sees Sen. Elizabeth Warren Elizabeth WarrenOvernight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds On The Money: Half of states deplete funds for Trump's 0 unemployment expansion | EU appealing ruling in Apple tax case | House Democrats include more aid for airlines in coronavirus package Warren, Khanna request IG investigation into Pentagon's use of coronavirus funds MORE (D-Mass.) surpass him in a handful of national and statewide polls.

A recent poll by the nonpartisan Public Policy Institute of California showed Biden in a virtual three-way tie with Warren and Sen. Bernie Sanders Bernie SandersSirota reacts to report of harassment, doxing by Harris supporters Republicans not immune to the malady that hobbled Democrats The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election MORE (I-Vt.) in the Golden State.