President Trump should not threaten to pull reporter’s credentials. He should pull the credentials of every main stream media reporter. Until they learned to act civilized, only OANN and RWBN reporters should be given credentials.
He should do "one and done". Ask a stupid question, get kicked out for a month.
I can imagine a reporter asking, "Did you kick the black reporter out because you are a racist?" Trump could say "That's a stupid question. See you in a month."