Congresswoman Maxine Waters (D-Calif.), a frequent critic of President Trump, said the president would be doing the United States "a favor" by resigning.

"Trump confessed to Reuters that being President is more challenging than he anticipated. He should do himself & the country a favor & resign," Waters tweeted Monday evening.

Waters, 78, has repeatedly accused Trump of working in collusion with the Russians and not being the legitimate president because Russian leader Vladimir Putin put his thumb on the electoral scales.

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"If we determine the fact that there has been collusion, then I really do think this president can be impeached," Waters said.

"Each day, we learn more and more about [the alleged collusion]," she said.

Tucker Carlson reported that Waters is speculating that the possible retirement of Rep. Jason Chaffetz (R-Utah) is because he is likely an agent of the Kremlin as well.

Watters told the Los Angeles Times she gained unexpected popularity from millennials because of her decision to "step outside the box" and harshly criticize the president.

The paper said she has been dubbed "Auntie Maxine."

Watch Carlson's debate with former DNC advisor Zac Petkanas above.

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