Donald Trump mocks Joe Biden’s stutter again, drawing criticism - The Washington Post

"What appalls me is we're now telling people it's okay to laugh at stuttering," said Sheehan, who had a severe stutter as a child. 

"And that's unforgivable." About 3 million Americans stutter, a communication disorder in which speech is not fluent because syllables or words are repeated or prolonged. The causes of stuttering are not fully known, but genetics can contribute. Stuttering has long been misunderstood and stigmatized...

https://www.washingtonpost.com/elections/2024/03/10/trump-biden-stutter/