House Minority Leader Nancy Pelosi on Tuesday formally endorsed Hillary Clinton for president on the same day voters headed to the polls for her state's critical primary in California.
"I'm a voter in California, and I have voted for Hillary Clinton for president of the United States and proud to endorse her for that position. But, I hasten to say that it's not over until it's over," Pelosi said in an interview on ABC's "Good Morning America."
The California Democrat, who was the first female speaker of the House, was one of a few Democratic leaders in Congress that withheld their endorsements for months.
California is among six states that are holding the last major primary contests on Tuesday, and it has the most at stake with 475 delegates up for grabs. Pelosi suggested she'd also love to see Clinton choose a woman as a running mate.
"We've had two men over and over again for hundreds of years. I think that two women, whoever they may be, that would be fabulous as well, but Hillary Clinton will choose the person that she feels most comfortable with," she said.
Sen. Elizabeth Warren, D-Massachusetts, has been floated as a strong possibility for a vice presidential pick since many believe her progressive views could help unite the party heading into the general election. Warren has not yet endorsed a candidate in the Democratic race, but has been bashing Donald Trump occasionally over the last month or so.
Pelosi has previously said she has long opposed her party's delegate allocation system because of its reliance on superdelegates.
On Monday night, Clinton became the first woman to top the presidential ticket of a major political party in the U.S. CBS News' Major Garrett confirmed that Clinton has secured enough superdelegates to clinch the nomination.