Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE’s presidential campaign is blasting Sen. Elizabeth Warren Elizabeth WarrenBiden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon MORE (D-Mass.) for an appearance with Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE, calling her "Sellout Warren."

“As Clinton tries to salvage support among the Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE wing of the Democrat Party, Senator Elizabeth Warren (D-MA) has become a turncoat for the causes she supposedly supports,” it said in a statement Monday.

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“Warren’s campaigning for Clinton stands in stark contrast to the liberal ideals she once practiced. Their sad attempt at pandering to the Sanders wing is another example of a typical political calculation by D.C. insiders.”

Trump’s camp said Clinton’s coziness with Wall Street undermines Warren’s frequently harsh criticism of wealthy special interests.

“While Warren claims that Wall Street businesses have too much influence in D.C. by paying ‘barely disguised bribes’ through campaign contributions, the Clinton campaign has accepted over $41 million this cycle from Wall Street interests,” it said.

Trump’s team added that Warren’s alliance with Clinton destroys the credibility of the senator's vocal opposition to the Trans-Pacific Partnership.

“Warren is also campaigning for the author of the Trans-Pacific Partnership, a deal she has routinely slammed,” it said. "This is a trade deal that Clinton has expressed support for in over 45 public speeches.

“Mr. Trump has been against TPP from the start of his campaign because he understands how detrimental it would be to American workers. He will continue to fight for the American people and serve them over the special interests in Washington, D.C.”

Warren earlier Monday blasted the presumptive Republican presidential nominee during her first joint appearance with Clinton on the campaign trail.

“What kind of man roots for people to lose their jobs, lose their homes, lose their life savings?” Warren asked at a rally in Cincinnati.

“I’ll tell you what kind of man: A small, insecure money-grubber who fights for one other than himself,” she added. "A nasty man who will never become president of the United States.”

Warren’s appearance with Clinton has fueled speculation about her chances of becoming the presumptive Democratic presidential nominee’s running mate.

Clinton is trying to court Sanders's supporters after an at-times bruising primary with the Independent Vermont senator.