Warning: the video above contains profanity.
Sen. Al Franken (D-MN) said this weekend that Republican senators have expressed concern privately over President Trump's mental state.
The "SNL" comedian-turned-lawmaker first made the claim to Bill Maher Friday night, saying there's a "range" of what his GOP colleagues have said to him.
Maher had asked what Republicans are saying "behind closed doors" on Capitol Hill.
"Some will say he's not not right mentally. Some are harsher," said Franken, drawing laughter from the crowd.
He added that he's heard "great concern about the president's temperament."
The Minnesota senator was then asked about the statement on CNN yesterday, explaining that a "few" senators have expressed concerns about the president's mental stability.
"We all have this suspicion that - you know, that he’s not - he lies a lot," Franken said, adding "that is not the norm for a president of the United States, or, actually, for a human being."
Meantime, Sen. Bernie Sanders (I-VT) called Trump "delusional" and a "pathological liar" in an interview on "Meet the Press."
"It is very harsh but that's the truth," he said.
On "America's Newsroom," strategists Lisa Boothe and Lynda Tran discussed the Democrats' inflammatory rhetoric.
Tran said there was a similar "breach of decorum" in 2009 when Rep. Joe Wilson (R-SC) screamed "you lie" at President Barack Obama as he addressed a joint session of Congress on health care.
Boothe disagreed with the comparison, arguing there's a "completely different standard" for liberals.
"How many times has a Republican candidate or even Donald Trump said something and the entirety of the Republican Party has to answer to it? That never happens on the left," said Boothe.