Elizabeth Warren Unleashes on Donald Trump at Hillary Clinton Campaign Event

CINCINNATI -- Hillary Clinton today brought a champion of the Democratic Party’s progressive wing, Elizabeth Warren, to the campaign trail in Ohio, where the Massachusetts senator slammed Donald Trump more like Clinton’s running mate than an opening act.

"Now, I'm here today because I'm with her. Yes, her. We're all here today because we're with her," Warren said in her first Clinton campaign event. "And we're going to work our hearts out to make Hillary Clinton the next president of the United States. Yes. I'm ready. Are you ready for this?"

Clinton and Warren took the stage together at Union Terminal at the Cincinnati Museum and raised their hands in the air as a team united, similar to what one would see at a party convention. Clinton called Warren her friend and a great leader, saying, "you just saw why she is considered so terrific, so formidable because she tells it like it is."

As she has the past two months, Warren continued attacking Trump on everything from his appearance, noting his "goofy hat," to his business practices.

"The guy who wants it all for himself. And watch out because he will crush you into the dirt to get whatever he wants. That's who he is," Warren said as cheers drowned out her words line after line. "Donald Trump cheered on Britain's current crisis, which has sucked billions of dollars out of your retirement accounts, because he said, ‘Hey, it might bring more rich people to his new golf course."

Warren said Trump's "a nasty man who will never become president" and, at one point, paused as cheers of "Hillary, Hillary, Hillary" echoed through the Union Terminal at the Cincinnati Museum.

But Warren wasn't in the battleground state just to slam Trump. She praised Clinton's record of "fighting for working families" and her plans to raise the minimum wage.

A gleeful Warren seemed to be having fun drawing contrasts between Clinton at Warren, saying, at one point, "You know I could do this all day. I really could. But I won't."

Warren is being formally vetted as a possible Vice President pick for Clinton, a source familiar with the process told ABC News today. Clinton was asked repeatedly about the prospect of putting Warren on the ticket while greeting supporters on the rope line after her remarks, but declined to respond.

"I'm not making any news today," she said with a smile.