In one fake image, President Trump cosplays as the pope. In another, he looks on as agents arrest Barack Obama. In a third, he stands atop a mountain, having conquered Canada.

The era of A.I. propaganda is here — and Trump is an enthusiastic participant. He has posted A.I. items dozens of times on his Truth Social account, according to a review by The Times. Over the weekend, he posted a video in which he flies a fighter jet and dumps excrement on protesters.

By Stuart A. Thompson