"See how @realDonaldTrump kept his father’s empire afloat using strategic corporate bankruptcies to skip out on debt," Sen. Elizabeth Warren said. | AP Photo Elizabeth Warren calls Donald Trump a 'loser'

Massachusetts Sen. Elizabeth Warren lit into Donald Trump on Monday, denouncing the Republican presidential frontrunner as a "loser" whose past business dealings and insecurities threaten to rip apart the United States.

In a multi-part tweetstorm and Facebook post, the Democratic senator referred to ongoing litigation over his businesses, including Trump University. "Let’s be honest - @realDonaldTrump is a loser. Count all his failed businesses. See how he cheated people w/ scams like Trump U.," Warren tweeted.


"See how @realDonaldTrump kept his father’s empire afloat using strategic corporate bankruptcies to skip out on debt," she followed.

Trump is a "loser," Warren tweeted, and he knows it.

"His embarrassing insecurities are on parade: petty bullying, attacks on women, cheap racism, and flagrant narcissism," she wrote. "But just because Trump is a loser everywhere else doesn’t mean he’ll lose this election. People have been underestimating his campaign for nearly a year – and it’s time to wake up."

Even if Trump is a "loser," she wrote, he is a dangerous one.

"More than anyone we’ve seen before come within reach of the presidency, Donald Trump stands ready to tear apart an America that was built on values like decency, community, and concern for our neighbors," she concluded. "Many of history’s worst authoritarians started out as losers – and Trump is a serious threat. The way I see it, it’s our job to make sure he ends this campaign every bit the loser that he started it."

.@RealDonaldTrump stands ready to tear apart an America that was built on values like decency, community, and concern for our neighbors. — Elizabeth Warren (@elizabethforma) March 21, 2016

Many of history’s worst authoritarians started out as losers – and @realDonaldTrump is a serious threat. — Elizabeth Warren (@elizabethforma) March 21, 2016

The way I see it, it’s our job to make sure @realDonaldTrump ends this campaign every bit the loser that he started it. — Elizabeth Warren (@elizabethforma) March 21, 2016