Sen. Elizabeth WarrenElizabeth Ann WarrenSanders can gain ground by zeroing in on corruption Biden praises Buttigieg for criticizing GOP attacks: 'That's a good man' Warren enters crucial debate with big momentum MORE (D-Mass.) on Wednesday ripped President TrumpDonald John TrumpWHCA calls on Trump to denounce video depicting him shooting media outlets Video of fake Trump shooting members of media shown at his Miami resort: report Trump hits Fox News's Chris Wallace over Ukraine coverage MORE for leading the “most corrupt administration ever.”

Warren went after the Trump administration during an interview with CNN after controversial statements from White House budget chief Mick MulvaneyJohn (Mick) Michael MulvaneyHillicon Valley: Trump official declines to testify on trade protections for tech | Senators call for better info-sharing on supply chain threats | Apple pulls app after Chinese pressure Overnight Energy: Dems subpoena Perry in impeachment inquiry | EPA to overhaul rules on lead contamination tests | Commerce staff wrote statement rebuking weather service for contradicting Trump Commerce staff drafted statement rebuking weather service for contradicting Trump's hurricane predictions MORE.

"He's so corrupt that he was willing to just lay it all out there in front of everyone," Warren said. “He said, 'I am a government official who pays attention to those who pay me.' If that's not corruption, I don't know what the definition of corruption is."

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Mulvaney, who is also the interim director of the Consumer Financial Protection Bureau, suggested Tuesday  that he gave preferential treatment to lobbyists who had donated to his campaign.

“If you were a lobbyist who never gave us money, I didn't talk to you. If you were a lobbyist who gave us money, I might talk to you,” Mulvaney said at a banker conference in Washington.

“If you came from back home and sat in my lobby, I would talk to you without exception, regardless of the financial contributions.”

Mulvaney is a former GOP congressman from South Carolina.

Warren ripped the suggestion as "pay-to-play."

"That's just another way of saying, 'this joint runs great for those who can hire armies of lobbyists and lawyers and have them make big campaign contributions, but not here for real people,’” Warren said Wednesday.

Warren, who serves on the Senate Banking Committee, has confronted Mulvaney before.

Earlier this month, she told him he was “hurting real people to score cheap political points.”