(CNN)Elizabeth Warren is dropping out of the presidential race, a source familiar with her plans tells CNN, following another round of disappointing finishes in primary contests across the country on Super Tuesday.
The Massachusetts senator, who centered her bid on a promise to wipe out corruption in Washington, is announcing her decision on a staff call Thursday morning.
Warren’s path to the nomination has been narrowing since the first round of voting in Iowa, where she placed third. In subsequent contests in New Hampshire and Nevada, she dropped down to fourth. In South Carolina, she came in a distant fifth.
The New York Times first reported that Warren is exiting the race.
Despite the mounting setbacks, Warren’s campaign was as recently as Sunday touting a plan to amass delegates through the late spring and make a play for the nomination, as a unity candidate, during the Democratic National Convention this summer. But those hopes were effectively dashed on Super Tuesday, when she failed to win her home state of Massachusetts, finishing third behind former vice president Joe Biden and Sen. Bernie Sanders, and mostly underperformed in a series of key states.
Her departure follows those of Minnesota Sen. Amy Klobuchar and former South Bend, Indiana, Mayor Pete Buttigieg, the latter of whom finished ahead of Warren in each of the four early state contests. Their rush to Biden, and the moderate consolidation that followed, combined with Sanders’ lock on progressive voters left Warren in a political no-man’s land. Former New York Mayor Michael Bloomberg exited the race on Wednesday.
Both Klobuchar and Buttigieg endorsed Biden on Monday. Warren, a respected progressive leader who has been fiercely critical of the former vice president and, at least until the current campaign heated up, a friend and ally of Sanders, has not yet indicated who she will support moving forward. Sanders said he spoke to Warren on Wednesday, but did not share any details from their conversation.
Once considered a leading contender for the nomination, Warren’s plummet began months before the first ballots were cast in what was a crowded primary field that saw multiple candidates shoot up in the polls before being batted down by their rivals. Of those who dropped out of the race before her, she was endorsed only by former Housing and Urban Development Secretary Julián Castro. He threw his support to Warren in early January, about a month before Iowa, but despite his passionate advocacy, failed to arrest her slide.
Warren was, at first, tripped up by the controversy surrounding her decision to publicize a DNA test meant to prove her Native American ancestry. She apologized to Native American leaders for both the DNA test and her controversial past claims.
She swore off big donors and began a trail tradition that became one her trademarks: a “selfie” line that followed her events and allowed voters to share a brief but intimate moment with the candidate
Warren touted her grassroots fundraising efforts by posting clips online of her calls to small dollar contributors and began doing a “pinkie promise” with some of her youngest female supporters, “so that they’ll remember that running for president is what girls do.”
Her campaign really took off in the spring and summer 2019 as she rolled out a comprehensive suite of what would eventually add up to more than 70 policy plans, addressing everything from anti-corruption legislation to the Green New Deal.
By the fall, she was leading in a number of early state polls and appeared to have gained a foothold with liberal voters around the country. They embraced her as the candidate with “a plan for that” — an identity the campaign embraced and ran with — and, in some progressive circles, was viewed as the more electable option over fellow favorite Sanders.
But her standing began to slip in the fall, when her support for “Medicare for All,” the universal, government-run medical insurance program, came under stricter scrutiny from moderate rivals like Biden, Klobuchar and Buttigieg. In response, she released a pair of proposals: one to finance Medicare for All without raising any taxes on middle class voters and another that would have effectively broken up the bill into two pieces.
Warren’s attempts to quiet the critics backfired. Opponents of Medicare for All,