IMHO, Trump’s hair started out as a bad comb over....that has become a trademark.
I’m still wondering how he got it to fit under a ball cap when he was at the border. :)
Not to put too fine a point on it, but a combover is a hairstyle where a bald-on-top man grows his side or back hair very long and combs it over the bald pate. That is not what Donald Trump does. He has all his hair. The most accurate description is "personal hairstyle."