But that led him to one key question.

“Which makes me wonder about the other half, the half of Trump voters who don’t believe it,” he said. “They’re still voting for him? How can that be?”

He made it clear how he would handle similar knowledge.

“I will tell you with certainty that if Kamala Harris told me Mexicans were eating chimpanzees, she would not get my vote,” he said.

See more in his Tuesday night monologue: