Public polls show Trump trailing all major Democratic Presidential hopefuls in most states, including key states that he won in 2016.
Trump doesn’t believe the public polls, so, he has commissioned his own polls.
His own polls show the same thing.
So — what does Trump do? Fires his internal pollsters.
This is not the way an adult acts — don’t like the facts, fire the people who bring you the facts. Of course, no one has ever accused Trump of being an adult.