Rep. Maxine Waters, D-Calif., said Thursday there is now enough evidence stacked against President Trump as part of the Russia probe that the Congress "should be moving on impeachment."

"I believe that there really has been collusion and I do think that our special counsel [Robert] Mueller is going to connect those dots," Waters told MSNBC, referring to Mueller's investigation into Russian interference in the 2016 presidential election and possible links between the Trump campaign and the Kremlin. "But I think there's enough now that we all know, and we all see, and we all understand that we should be moving on impeachment."

Waters' call comes as Rep. Al Green, D-Texas, introduced articles of impeachment on the House floor on Wednesday, asking that the 25th Amendment be invoked against Trump because "enough is enough." But the outspoken Democrat let the privileged resolution die later that day, saying he would force a vote later.

Discontent is also growing among congressional Republicans as evidenced by retiring Sen. Bob Corker, R-Tenn., describing the White House as "an adult day care center."

"Republicans should step up to the plate and confront the fact that this president appears to be unstable, that he appears to be taking us into war, that he has openly obstructed justice in front of our face, and that increasingly we're finding that there's more and more lies about the connection with Russia," Waters added.