“Please stop it with voting for Trump. It was funny for a little while. But the guy is Hitler,” C.K. wrote to fans on his email list.
When Colbert reminded him of his comments, C.K. downplayed the remark.
The “Late Show” host asked C.K. how his perception of Trump has changed.
“Now, I guess he’s not as profound as I thought he was. I thought he was some new kind of evil. But he’s just a lying sack of sh*t,” the comedian explained.
He went on to explain the difference in his mind between certain people who tell lies. “Sometimes people lie. ‘That guy lied, they found out he lied.’ And then there’s somebody who lies once in a while, can’t quite stay inside the boundaries of truth, right? Somebody who lies sometimes.”
WATCH: Stephen Colbert takes aim at ‘unqualified’ Jared Kushner on ‘Late Show’
“Then you have a liar, who’s somebody who has a problem, they can’t help it, they lie a lot. And then you have a lying sack of sh*t… They like it, he likes it… It’s insane, he’s just a gross, crook, dirty, lying sack of sh*t,” C.K. said of Trump.
The pair pointed out a Trump voter in the audience and C.K. joked that he was the “victim” of Trump’s lies.
“He lied to him. He didn’t lie to me. Everybody else was like, ‘no, that’s not true.’ But that guy bought it. So he’s the victim of the lying,” C.K. joked.
Colbert added that it’s “refreshing” to see a person who lies so much, “I don’t know what colour his hair is. I don’t know what colour his skin is. I don’t know how much money he has.”
“Don’t you want God to show up and say ‘I was just kidding’ about everything? I just wish that he would,” C.K. said about the current political situation in the U.S.
WATCH: Colbert trolls Kellyanne Conway by using microwave cameras to film Late Show
During Monday’s episode of the “Late Show,“ Colbert likened Trump to the “Tranformers” villain named Megatron, while discussing Trump’s ties to Russia.
“When I say fake news, this is real fake news,” Colbert said. “Not fake fake news. That is real news that Donald Trump just doesn’t like. This is made-up stuff. There’s a difference.”
“Because if enough people say something is popular, I might trust that it’s good,” Colbert said. “It’s like how if one person tells me how ‘Transformers’ is a good movie. I might not see it. But if everyone on Facebook is raving about it, I’ll go. And by the time I realize I was lied to, Megatron is president.”
Watch the Louis C.K. clip in the video above.