Elizabeth Warren Campaigns for Hillary Clinton for First Time, Calls Donald Trump a 'Small, Insecure Money Grubber'

Elizabeth Warren attempted to beat Donald Trump at his own name-calling game in her first campaign event for Hillary Clinton in Cincinnati on Monday.

The Massachusetts senator, who is reportedly being vetted as a possible vice presidential pick for Clinton, declared presumptive GOP nominee Trump "a small, insecure money grubber," a "nasty man who will never become president of the United States" and a "thin-skinned bully," among other insults.

Clinton and Warren made a striking pair on stage at the Cincinnati Museum Center at Union Terminal as they clasped hands and triumphantly raised their fists high in the air. Supporters hoping for a Clinton-Warren ticket were seen waving "Girl Power" signs as they cheered on the two women.

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Warren, who has recently become one of Trump's most vocal critics, also accused the billionaire businessman of being out for himself only and not for the American people.

"When Donald Trump says 'great,' I ask: 'great for who, exactly?' " Warren said. "When Donald says he'll make America great, he means greater for rich guys just like Donald Trump. That's who Donald Trump is ... And you have to watch out for him, because he'll crush you into the dirt to get whatever he wants."

Warren praised Clinton as "someone who gets up every single day and fights for us" and applauded her advocacy for families and children, her "steady hands" and her "good heart."

And Clinton was just as effusive in her praise of Warren, telling supporters, "You just saw why she is so terrific, so formidable. Because she tells it like it is."

"I have to say, I do just love how she gets under Donald Trump's skin," Clinton added.

It looks like Warren was able to accomplish just that with her speech on Monday.

Shortly after Clinton and Warren's joint appearance, Trump's campaign fired off an email titled "Sellout Warren," labeling the progressive darling – who many believe was enlisted by Clinton to win over skeptical Bernie Sanders voters – "a turncoat for the causes she supposedly supports."

"While Warren claims that Wall Street businesses have too much influence in D.C., by paying 'barely disguised bribes,' through campaign contributions," the statement reads. "The Clinton campaign has accepted over $41 million this cycle from Wall Street interests. Warren is also campaigning for the author of the Trans-Pacific Partnership, a deal she has routinely slammed. This is a trade deal that Clinton has expressed support for in over 45 public speeches."

"Warren's campaigning for Clinton stands in stark contrast to the liberal ideals she once practiced," the statement continues. "This sad attempt at pandering to the Sanders wing is another example of a typical political calculation by D.C. insiders."

"Sellout Warren" appears to be a new nickname from Trump, who has previously shown a preference for "Pocahontas" – a reference to the 2012 controversy surrounding Warren's Native American heritage – or "Goofy Elizabeth Warren."

Warren turned one of Trump's insults against him at the campaign event Monday, saying, "Donald Trump says he'll make America great again ... It's stamped on the front of his goofy hats."

"You want to see goofy? Look at him in that hat."