Vermont Sen. Bernie Sanders has the most to gain from Massachusetts Sen. Elizabeth Warren's decision to drop out of the presidential race, according to an Insider national survey.

About 70% of Warren's supporters who were polled by Insider said they would also be satisfied if Sanders was the Democratic nominee.

Former Vice President Joe Biden pulled off a stunning campaign comeback, winning in most of the Super Tuesday states, but Sanders is in the lead for the biggest prize: California.

As the race narrowed between Sanders and Biden, calls for Warren to drop out rose among Sanders' supporters.

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As the dust settles from a surprising Super Tuesday, one fact has clearly emerged: The race for the Democratic nomination is now a two-way contest between Sen. Bernie Sanders and former Vice President Joe Biden.

And now, all eyes on are on Sen. Elizabeth Warren, who will drop out of the race Thursday, the New York Times reported.

Warren had a disastrous Super Tuesday. She failed to come in higher than third in any of the contests, despite a February that featured headline-grabbing takedowns of former New York Mayor Mike Bloomberg in two consecutive debates and a record fundraising haul for her campaign.

Sanders, who is now neck and neck with Biden, would stand to benefit the most by Warren exiting the race, according to Insider's national survey.

About 70% of Warren's supporters who were surveyed said they would also be satisfied with Sanders as the Democratic nominee, indicating there is significant overlap between the two candidates' bases.

Biden was a satisfactory choice for about 55% of Warren supporters, an indication that he could also pick up some of Warren's voters.

Insider polling found that of Warren's supporters, 70% would be satisfied if Sen. Bernie Sanders were the Democratic nominee. Skye Gould/Business Insider

Biden won a majority of the 14 states that were up for grabs, while Sanders won his home state of Vermont and on Wednesday was leading the race for Super Tuesday's biggest prize: California, the state with the most delegates.

Bloomberg quickly dropped out of the contest after his half-a-billion-dollar campaign failed to deliver him any states and endorsed Biden.

By Thursday, Warren was far behind in the delegate count and faced pressure from both Sanders' and Biden's supporters to exit the race.

President Donald Trump tried to stoke these divisions on Twitter Wednesday morning, tweeting, "If Elizabeth Warren wasn't in the race, Bernie Sanders would have EASILY won Massachusetts, Minnesota and Texas, not to mention various other states... she may very well go down as the all time great SPOILER!"

After the Super Tuesday results came in, some Warren supporters said they were shifting their support to Sanders.

Paul Newell, a Democratic district leader in New York City, tweeted that he was shifting his support from Warren to Sanders.

"As a pledged delegate candidate for Warren, this was not an easy decision," he wrote. "But supporting Sanders is now the only path to the big, structural change that Warren champions."

But others expressed concerns that the last serious female contender in the race was being pressured to drop out so that two men would have a clearer path to victory.

"If you're upset Warren isn't dropping out in service of Bernie you need to sit down and think about why you're reaffirming the very power structures you say you want to overthrow," the feminist author and journalist Liz Plank tweeted.

Warren was weighing her options as late as Wednesday. Roger Lau, Warren's campaign manager, wrote on Medium that "we are obviously disappointed, and Elizabeth is talking with our team to assess the path forward."

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