Elizabeth Warren mops the floor with Trump on Twitter: 'Let's be honest — Donald Trump is a loser'
Elizabeth Warren at an AFL-CIO rally in 2015 (Ben Wikler/Flickr)

Sen. Elizabeth Warren (D-MA) is turning up the heat in her ongoing battle with Donald Trump.

The progressive senator took to Twitter on Monday afternoon, to let loose with a veritable essay tearing down Trump as perhaps the worst thing of all: a "loser."

After Warren gave an interview slamming Trump for "even threatening to get anywhere near the presidency," The Donald then reached for everything he could to put Warren down. (Regardless of whether it lined up with the facts.)

But for her part, Warren can swing right back again — and on Trump's own medium of choice for lobbing insults against his enemies:

But, Warren warned, there is a serious danger here — the loser could win this one.

Warren also posted the text to Facebook, with an extra paragraph on the stakes in this election:

People talk about how "this is the most important election" in our lifetime every four years, and it gets stale. But consider what hangs in the balance. Affordable college. Accountability for Wall Street. Healthcare for millions of Americans. The Supreme Court. Big corporations and billionaires paying their fair share of taxes. Expanded Social Security. Investments in infrastructure and medical research and jobs right here in America. The chance to turn our back on the ugliness of hatred, sexism, racism and xenophobia. The chance to be a better people.

So here are the orders from Sen. Warren, to all her supporters: