Boring topic. I'm sure that most, if not all, presidents are potty mouths. Who wouldn't be when you have the most stressful job in the world?
Just a few years ago, this article (and others like it) ran about Trump's use of profanity. Apparently his followers like it.
His is the profanity presidency, full of four-letter denunciations of his enemies and earthy dismissals of allegations lodged against him. At rallies and in interviews, on Twitter and in formal speeches, he relishes the bad-boy language of a shock jock, just one more way of gleefully provoking the political establishment bothered by his norm-shattering ways.
In a single speech on Friday alone, he managed to throw out a “hell,” an “ass” and a couple of “bullshits” for good measure. In the course of just one rally in Panama City Beach, Fla., earlier this month, he tossed out 10 “hells,” three “damns” and a “crap.” The audiences did not seem to mind. They cheered and whooped and applauded.
“I’d say swearing is part of his appeal,” said Melissa Mohr, the author of “Holy Sh*t: A Brief History of Swearing,” published in 2013. “It helps create the impression that he is saying what he thinks, ‘telling it like it is.’ We tend to believe people when they swear, because we interpret these words as a sign of strong emotions. In his case, the emotion is often powerful anger, which his supporters seem to love.”
Profanity President: Trump's Four-Letter Vocabulary
https://www.nytimes.com/2019/05/19/us/politics/trump-language.html