Democratic presidential candidate Bernie Sanders — fighting to keep his campaign alive in today’s Super Tuesday contests — vowed to a cheering crowd of thousands at Milton High School last night that he’ll defeat Hillary Clinton in the primary, and go on to beat GOP front-runner Donald Trump.

“I have been accused of not being electable, that I can’t beat Donald Trump,” the Vermont senator told a crowd estimated at 3,600.

“Not only will we beat him, we will beat him badly.”

Sanders said he would beat him because, unlike Trump, most Americans “believe we should raise the starvation (federal) minimum wage of $7.25 an hour. Wages in America are not too high; they’re too low.”

And Sanders said he would defeat the billionaire because Americans “do not want a president who insults women … who insults veterans like (U.S. Sen.) John McCain and who basically insults anyone who’s not just like him.”

The senator took aim at Clinton, repeating his criticism of her for having a super PAC that takes contributions from Wall Street and for accepting $225,000 from Goldman Sachs for a speech she gave and then refusing to release the transcript.

Sanders also reiterated his criticism of her vote to invade Iraq and her support for the 1996 Defense of Marriage Act denying same-sex couples federal benefits.

Sanders said the United States is the only Western nation that does not guarantee paid family leave, and vowed to pass three months of paid leave if he is elected.

His message was met with near-deafening applause and chants of “Bernie, Bernie!” from the crowd.

A win in Massachusetts is critical for both Sanders and Clinton — he’s from neighboring Vermont, and she traditionally has strong support here. Recent polls have shown a tight race, with each taking turns in the lead in separate polls.

U.S. Sen. Edward Markey, a Clinton supporter, told Boston Herald Radio, “If Hillary can win in Massachusetts, a neighboring state of his … then I think it’s going to be a tough story for the supporters of Bernie to try to explain away going forward.”