President Trump posted a blatantly racist video clip portraying former President Barack Obama and the former first lady Michelle Obama as apes, then deleted it after an unusually strong outcry from members of his own party.

The clip, set to “The Lion Sleeps Tonight,” was spliced near the end of a 62-second video that promoted conspiracy theories about the 2020 election and was posted by Mr. Trump late Thursday night. It was the latest in a pattern by Mr. Trump of promoting offensive imagery and slurs about Black Americans and others.