President Trump never admits a mistake.
Even when the mistake is blatantly obvious, Trump still refuses to fess up. He goes to absurd lengths to attempt to falsely explain it away.
A typical example is the recent clamor over Trump’s obvious mistake of warning the nation that the state of Alabama was in the path of Hurricane Dorian and was at risk of suffering severe damage. The National Weather Service immediately issued a correction saying that Alabama, in fact, was not in the path of the hurricane and thus was not at risk of suffering any damage.