What did Donald Trump do today?

He attacked an imaginary version of Robert Mueller.

Trump used the 75th anniversary commemoration of D-Day to give an interview in Normandy, France with Fox News host Laura Ingraham. With the graves of American soldiers in the background, Trump said this about special counsel Robert Mueller, a former Marine and Bronze Star recipient:

INGRAHAM: Do you mind if he testifies still? Before, you said you didn't care if Mueller testified. 

TRUMP: Let me tell you, he made such a fool out of himself the last time he — because what people don't report is the letter he had to do to straighten out his testimony because his testimony was wrong.

It's not unusual for Trump to insult Mueller, but there's a bigger problem with this statement: Mueller hasn't testified about the Russia probe yet. Congress and 73% of Americans want him to, but there are no concrete plans for it at the moment.

The only letter Mueller has sent on the subject of the Russia probe was to Trump's hand-picked attorney general, William Barr, and that letter isn't something Trump would want to draw attention to.

In short, Trump seems to have imagined Mueller's testimony, and also fantasized that Mueller had to retract it.

Trump was imagining the "corrective letter" in a tweet this past Sunday, but at that point he still seemed to understand that Mueller hadn't testified. 

Why should I care about this?

• Trump is not mentally healthy enough to be President of the United States.