U.S. Senator Kamala Harris withdrew from the Democratic presidential field Tuesday afternoon, saying her campaign “simply doesn’t have the financial resources we need to continue.”

“I’m not a billionaire. I can’t fund my own campaign,” said Harris, in a statement released to supporters and the press. “And as the campaign has gone on, it’s become harder and harder to raise the money we need to compete.”

Billionaire former New York City Mayor Michael Bloomberg, who entered the race for the Democratic nomination only last week, immediately overtook Harris in polling. And billionaire businessman Tom Steyer had already qualified for the December Democratic debate.

But Harris had qualified for the December debate but, in polling, her consistently fifth or sixth place stature had shown signs of eroding, slipping from a high of 20 percent to two percent as of December 1.

Harris did well with LGBT voters. A study of campaign contributions from heavily LGBT zip codes showed her the second strongest fundraiser, behind openly gay candidate Pete Buttigieg.

At the end of the last reporting period, September 30, Harris had about $9 million in her campaign coffers; Buttigieg had $23 million. But former Vice President Joe Biden, who continues to lead in national polls, had only $9 million in his campaign chest at the end of September, according to Federal Election Commission reports.

Harris launched her campaign in January in Oakland, with a rally attended by more than 20,000 supporters. She ended it Tuesday, an email to supporters, “although I am no longer running for President, I will do everything in my power to defeat Donald Trump and fight for the future of our country and the best of who we are.”

As recently as Monday night, the Harris campaign was sending out routine press releases, announcing endorsements. Early Monday afternoon, the campaign issued a press release announcing that California Governor Gavin Newsom would be campaigning for Harris in Iowa December 14 and 15. Newsom, a Democrat, endorsed Harris in February.

Harris had polled in third place early in the year, behind former Vice President Joe Biden and U.S. Senator Bernie Sanders, and she experienced a surge of support following the June debate when she confronted Biden over his pride in having worked with segregationists “to oppose busing.” But U.S. Senator Elizabeth Warren and South Bend Mayor Pete Buttigieg soon had their own surges and quickly leap-frogged over her.

Harris was one of the few Democratic presidential candidates to release her own plan addressing a wide range of LGBT issues. Among other things, she said she would appoint a “Chief Advocate for LGBTQ+ Affairs” at the White House and fund a new office to help various federal agencies in their work with the community.