Former Vice President Joe Biden won an upset victory in the Massachusetts Democratic Primary Tuesday night, one of a string of victories that bolstered a previously moribund campaign.

The win, which gave Biden a portion of the state's 91 delegates, came after a number of other victories that began in the South and included Virginia, Alabama, North Carolina, Oklahoma, Minnesota and Tennessee.

Vermont Sen. Bernie Sanders — the front-runner in the Commonwealth and nationally as voting began — performed poorly in eastern states, but did better in the west, with victories in Colorado, Utah and Vermont. He also won the biggest prize of the night, California, which has 415 total delegates, and came in second in Massachusetts.

Massachusetts Sen. Elizabeth Warren came in third in her home state with about 20 percent of the vote.

President Donald Trump won the Republican primary in Massachusetts, defeating former Gov. Bill Weld with almost 88 percent of the vote.

Biden and Sanders took aim at each other through dueling victory speeches separated by 2,500 miles Tuesday night.

“People are talking about a revolution. We started a movement," Biden said in Los Angeles, knocking one of Sanders' signature lines.

And without citing his surging rival by name, Sanders swiped at Biden from a victory speech in Burlington, Vermont.

“You cannot beat Trump with the same-old, same-old kind of politics,” Sanders declared, ticking down a list of past policy differences with Biden on Social Security, trade and military force. “This will become a contrast in ideas.”

Fourteen states including held their primaries on Tuesday, providing the opportunity for millions of voters to shape the course of the competitive Democratic race.

What began as a crowded field of 21 Democratic candidates whittled itself down to six by Tuesday night. Sanders emerged as the front runner after an overwhelming victory in the Nevada Primary coming swiftly on the heels of a first-place finish in January's New Hampshire primary, giving him 60 of the 155 declared delegates going into the evening's contest.

Nonetheless, in recent days former Biden's campaign received a much needed boost after securing key endorsements and a win in South Carolina over the weekend. He entered Super Tuesday with 54 delegates.

The race largely became a contest between Biden and Sanders after both Minnesota Sen. Amy Klobuchar and former South Bend, Indiana, Mayor Pete Buttigieg dropped out of the race and endorsed Biden in the wake of poor performances in South Carolina.

Tuesday was also a milestone in former New York City Mayor in Michael Bloomberg's campaign as the first time the former New York City mayor was on the ballot. Bloomberg funded the campaign with his own fortune, a move that has spurred criticism from the Left.

Warren has vowed to remain in the race. As she exited her polling location in Cambridge Tuesday morning, she bristled at a reporter's suggestion that the 14 contests amounted to a do or die moment for her campaign.

"I am not worried," State House News quoted her as saying. "I am happy to be a part of this democratic process."

Warren did not remain in Massachusetts to watch the results come in, opting instead to head to Michigan. Her campaign did not have an official watch party or event open to reporters to mark her home state primary.

Like Warren, Weld said he would remain in the race. "I'm going to continue to do the same thing I've been doing," he said, "which is to try to make the points that the country needs to focus on.”

Hawaii Rep. Tulsi Gabbard — the most conservative of the democratic candidates — entered Super Tuesday with zero delegates. She held a town hall in Detroit on Tuesday evening.