(CNN) Elizabeth Warren dropped out of the presidential race 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, announced her decision on a staff call Thursday morning and later held a news conference outside of her home in Cambridge, Massachusetts.

"I announced this morning that I am suspending my campaign for president," Warren told reporters.

She continued: "I say this with a deep sense of gratitude for every single person who got in this fight, every single person who tried out a new idea, every single person who just moved a little in their notion of what a President of the United States should look like."

The senator said while she will no longer seek the Democratic nomination, "I guarantee I will stay in the fight for the hardworking folks across the country who have gotten the short end of the stick over and over."

Warren said she was not going to make an announcement about endorsing another candidate for president on Thursday.

"I need some space around this," Warren said, "and I want to take a little time to think a little more."

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.

Former presidential candidate Elizabeth Warren Elizabeth Warren, a US senator from Massachusetts, speaks during a campaign event in March 2019. Warren is held by her father, Donald Herring, soon after she was born in Oklahoma City in 1949. "My daddy worked hard his whole life," Warren said when she posted this picture to Facebook on Father's Day 2014. "He sold fencing and carpeting, and ended up as a maintenance man. He and my mother never had much, but he said that his life was a success because his four kids had more opportunities than he had." A young Warren sits with her mother, Pauline. "When I was 12, my daddy had a heart attack," Warren wrote on Facebook in 2017. "All three of my brothers were off in the military, and Daddy was out of work for a long time. We lost our family station wagon, and we were about an inch away from losing our home. One day, I walked into my mother's room and found her crying. She said, 'We are not going to lose this house.' She wiped her eyes, blew her nose, and pulled on her best dress -- the one she wore to funerals and graduations. At 50 years old, she walked down the street and got her first paying job: answering the phones at Sears. That minimum wage job saved our home, and my mother saved our family." Warren poses for a Christmas photo with her brother John. All three of her brothers served in the military. In the late 1960s, Warren attended George Washington University on a debate scholarship. She dropped out after two years to get married, but she graduated from the University of Houston in 1970. Warren holds her newborn daughter, Amelia, in 1971. She and her first husband, Jim Warren, had two children before divorcing in 1980. Warren with her three brothers -- Don, John and David -- in 1980. After graduating from college, Warren worked as a speech pathologist at a New Jersey elementary school. She then got a law degree and taught at the Rutgers School of Law before becoming a professor at the University of Houston Law Center. She's also been a professor at the University of Texas Law School, the University of Pennsylvania Law School and Harvard Law School. Warren and her second husband, Bruce Mann. She posted this old photo to Facebook in 2016 along with a story about how she proposed to him. They were married in 1980. Warren teaches at the University of Pennsylvania Law School in the early 1990s. US Sen. Barack Obama listens to Warren speak during a roundtable discussion about predatory lending in 2008. Warren is an expert on bankruptcy law and was an adviser to the National Bankruptcy Review Commission in the 1990s. In 1989, Warren co-authored the book "As We Forgive Our Debtors: Bankruptcy and Consumer Credit in America." Warren takes her seat to testify before the House Budget Committee in 2009. The United States was battling a recession at the time, and Warren had been appointed to a congressional oversight panel overseeing the $700 billion Troubled Assets Relief Program. Warren and Treasury Secretary Timothy Geithner listen to President Barack Obama at the White House in September 2010. Obama was appointing Warren to be his assistant and special adviser to the Treasury Secretary in order to launch the Consumer Financial Protection Bureau. Warren had long called for a federal agency designed to protect consumers from fraudulent or misleading financial products. Warren and US Sen. Scott Brown, right, make fun of each other during an annual St. Patrick's Day breakfast in Boston. Warren announced in 2011 that she would be challenging Brown for his Senate seat.. Warren speaks to constituents at a campaign event in Scituate, Massachusetts, in May 2012. Warren takes a morning walk with her dog Otis on the Harvard University Business School campus in May 2012. Warren stands with family members after giving a speech in Springfield, Massachusetts, in June 2012. Warren has several grandchildren. President Barack Obama greets Warren at a fundraiser in Boston in June 2012. Warren speaks at the Democratic National Convention in September 2012. Warren greets supporters during a campaign event at Boston University. Warren takes the stage after defeating Brown for a Senate seat in November 2012. Warren listens during a hearing of the Senate Committee on Banking, Housing and Urban Affairs in May 2013. Warren meets with Supreme Court nominee Merrick Garland in April 2016. Warren campaigns with Democratic presidential candidate Hillary Clinton in June 2016. Warren, a member of the Senate Banking Committee, questions Wells Fargo CEO John Stumpf in September 2016. Warren unleashed a verbal barrage at Stumpf, calling the embattled bank boss "gutless" and demanding he step down. Her diatribe was the most forceful condemnation yet of Wells Fargo, who fired more than 5,000 employees over the years for creating fake accounts without customer knowledge. The employees created the fraudulent accounts to meet bank quotas and were allegedly threatened with firing if they didn't comply. In January 2017, Warren posted this photo of her and Obama together. Obama was leaving after two terms as President. Warren holds a transcript of her speech in the Senate Chamber after she was cut off during the debate over Attorney General-designate Jeff Sessions in February 2017. In an extremely rare rebuke, Senate Majority Leader Mitch McConnell silenced Warren after he determined that she violated a Senate rule against impugning another senator. Warren was reading from a 1986 letter in which Coretta Scott King, the widow of Martin Luther King Jr., was critical of Sessions -- who at the time was a nominee to be a federal judge. Warren and other Democrats listen as President Donald Trump speaks to a joint session of Congress in February 2017. US Sen. Bob Corker talks with Warren during a Senate committee hearing in June 2017. Warren attends a confirmation hearing for Jerome Powell, who was nominated to be chairman of the Federal Reserve, in November 2017. It was a day after President Donald Trump referenced Warren as "Pocahontas" during an event honoring Navajo code talkers. Conservatives have long criticized Warren for claiming that she is part Native American, and the senator's heritage became an issue during her Senate campaigns. Trump seized on the attacks and has regularly mocked Warren by calling her "Pocahontas." In October 2018, Warren released results of a DNA test showing she has distant Native American ancestry. The DNA results claimed "strong evidence" of Native American ancestry "6-10 generations ago." But it only served to intensify the criticism given her distant ties. Warren runs down Boston's Clarendon Street waving to crowds during the annual Boston Pride Parade in June 2018. Warren and US Sen. Susan Collins ride the Senate subway in June 2018. Warren is seen in the sunglasses of Arian Rustemi during a rally in Boston in June 2018. Warren was calling for the swift reunification of children and parents who had been separated at the US-Mexico border. Warren helps Georgia gubernatorial candidate Stacey Abrams make calls to voters in October 2018. A Warren figurine sits in the back pocket of Mary Jo Kane during a town-hall event in Boston in October 2018. Warren was re-elected in 2018. Here, she is joined by her husband, Bruce Mann, as Vice President Mike Pence re-enacts her swearing-in. Warren, her husband and dog Bailey attend an event in Manchester, New Hampshire, in January 2019. Warren had recently announced that she was forming an exploratory committee for the 2020 presidential race. Warren speaks in Columbia, South Carolina, in January 2019. Warren looks down at the crowd in Lawrence, Massachusetts, before formally announcing her presidential bid in February 2019. Warren answers questions at a town-hall event in Jackson, Mississippi, in March 2019. Warren makes a pinky promise with 8-year-old Sydney Hansen during a campaign stop in Peterborough, New Hampshire, in July 2019. US Sen. Bernie Sanders grabs Warren's hand during the CNN Democratic debates in July 2019. Sanders and Warren, two of the most progressive candidates in the field, were targeted early in their debate by their more moderate counterparts. Warren speaks at her Super Tuesday rally in Detroit in March 2020. Warren acknowledges supporters as she arrives to speak to the media outside her home in Cambridge, Massachusetts, in March 2020. She had just dropped out of the presidential race. Warren appears on "Saturday Night Live" with actress Kate McKinnon, playing Warren, in March 2020. "I wanted to put on my favorite outfit to thank you for all you've done in your lifetime," McKinnon said. "I'm not dead," Warren responded. "I'm just in the Senate." The two then said the show's famous catchphrase, "Live ... from New York! It's Saturday night!" Warren asks questions during a Senate committee hearing in June 2020. She was appearing via video conference because of the coronavirus pandemic.

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 exit officially leaves Biden and Sanders as the final top contenders for the Democratic nomination.

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.

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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.

Senator Elizabeth Warren and Julian Castro pose for selfies with her followers during a rally on January 7, 2020 in New York City.

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, boosted by an industry spending campaign designed to drive down its popularity, continued their attacks. Progressives, too, became dissatisfied, voicing concerns over the senator's commitment to passing the legislation.

By the Iowa caucuses, Warren had fallen behind Sanders and had begun to see a sizable number of her more moderate supporters flock to Buttigieg, who, despite their political differences, also appealed to more affluent, white college-educated voters.

But the crushing blow likely came later, in South Carolina, where she finished a distant fifth.

Throughout the campaign, Warren kept up a concerted effort to directly address the African-American community. Her targeted plans-within-plans sought to combat economic and social inequality with proposals that acknowledged and offered policy solutions that she argued would begin to undo generations of systemic discrimination in everything from housing to health and business. But when the contest arrived in down South, her attempts to make inroads into the community fell flat.

Despite those setbacks, the campaign continued to argue that Warren was the only candidate who could bridge the Democratic Party's divisions -- a progressive with the credentials and charisma to win over voters across the ideological spectrum.

By February, though, the campaign -- which had spent its dollars in anticipation of a long nomination fight -- was in a cash crunch. She got a fundraising boost after a lauded debate performance in Las Vegas, where she targeted Bloomberg over the billionaire's past treatment of women at his company and his support for "stop and frisk" during his time as mayor of New York City.

But because of high early voting in Nevada, which happened before the debate, the bump that followed didn't translate into a surge of support in the state's caucuses days later.

In the final weeks of her campaign, Warren also relented on her long-standing refusal to accept the support of a super PAC, which ended up spending heavily -- in excess of $13 million during its brief run -- across the Super Tuesday map, arguing that she would not unilaterally disarm in an increasing expensive campaign.

As her prospects dwindled, Warren increasingly turned her fire on Sanders, arguing that, for all their policy agreements, he was -- unlike her -- an ineffectual legislator with a short resume of accomplishments during three decades in Congress. The turn began to upset some progressives who worried that her criticism would damage the Vermont senator at a time when moderates were coalescing around Biden.

But there is no clear sign that Warren's departure, without a vocal endorsement and energetic campaigning on his behalf, will benefit Sanders. Her coalition of support was ultimately too thin to vault her into the upper tier of the primary, but its ideological diversity likely means that it will splinter among the remaining candidates.

This story has been updated with additional reporting from Warren's staff call and with reporting from her news conference.