Note to White House staffers: Don’t cough when the president’s trying to explain how “phenomenal” and “fantastic” his financial statement is.

Take it from Mick Mulvaney, who found out the hard way.

“ ‘I don’t like that, you know, I don’t like that. If you’re going to cough, please leave the room. You just can’t, you just can’t cough. Boy oh boy.’ ”

That’s Donald Trump apparently admonishing his chief of staff during an interview with ABC’s George Stephanopoulos that aired on Sunday.