Rep. Maxine Waters, D-Calif., escalated her ongoing feud with President Donald Trump, calling him “the most deplorable, the most despicable human being” and advocating his impeachment.

Waters received a hero’s welcome, including two standing ovations, at the annual Congressional Black Caucus Foundation conference Thursday in Washington.

Introduced as a leader of the “resistance,” Waters spoke for more than 30 minutes about the Trump administration’s policies related to criminal justice. After finishing her prepared remarks, she made her most pointed comments about  the president.

“This is a bad time—to put it mildly. I’ve never seen anything like it in my life,” Waters said. “I think he’s the most deplorable, the most despicable human being I’ve ever encountered. He’s a liar. He’s dangerous. He’s alienated all our allies. And he’s in bed with [Vladimir] Putin, the oligarchs, and the Kremlin of Russia.”

She then called on the House of Representatives to impeach Trump.

“This president is so outrageous and egotistical, he said, ‘I can pardon anybody, and I can even pardon myself.’ Well, he may be able to pardon himself, but we’re able—if we really do our jobs—to get him impeached,” Waters said. “Let’s see if he can pardon himself from that. I don’t think so.”

Earlier this week, Trump responded to the California Democrat’s recent attacks with one of his own.

Waters spoke as part of a panel titled “The Dangerous Policies of Attorney General Jeff Sessions and the Trump Administration.” Panelists criticized Sessions for undoing Obama administration policies related to privately owned prisons and for reviving the “war on drugs.”

Waters likened to slavery the Trump administration’s border policy of separating children from illegal immigrants.

“I know it is right to fight against separation of mothers and fathers and families because of what happened to us in slavery,” she said. “They sold us on the auction block. They sent the father to one plantation. They sent children to other plantations. … They separated us.”

Waters also criticized Trump’s choice of D.C. Circuit Judge Brett Kavanaugh for the U.S. Supreme Court. She said Kavanaugh would shield Trump if confirmed by the Senate.

The Congressional Black Caucus Foundation’s Annual Legislative Conference began Wednesday and ends Sunday.