What did Donald Trump do today?

He got trolled into a Twitter fight.

Anthony Scaramucci served a memorable 11-day tenure as Trump's communications director, one of six people to fill that role so far. Like many Trump appointees, he got the job over the objections of people who knew better, left abruptly, and then had a public falling out with Trump.

Tonight, Scaramucci was interviewed on Fox News. He called Trump a "bully" and a "divider" who was shrinking the Republican party. 

Trump, who spent the day golfing and and asking people for campaign money, was immediately baited into a response.

Trump frequently tells stories about people "begging" him for things, but as usual, there's no evidence Scaramucci asked him for anything after being fired.

Trump's tweet drew far more attention to the interview—and Scaramucci's criticisms of him—than it would have gotten otherwise. It was the top trending topic on Twitter Sunday evening.

Why should I care about this?

• There might be more important things for the President of the United States to be worrying about right now.

• If you are constantly explaining how horrible your former employees are, they may not be the problem.

• It's bad if the president can't control his emotional outbursts.