I've wondered about Don King several times. He is ALWAYS carrying at least a half dozen miniature American flags whenever at an event. I've heard him make several glowing statements about Bush in general. But on the other hand, he has a reputation as a hugely corrupt guy, so its difficult to take him at face value. Given his crazy character though, I'd love to hear that it's legit :)
I've heard that Don King supports whoever's in the White House, regardless of party.
I don't know how true that is though.
This year he was very vocal pro Bush and vocal anti-democrat.
However, its pretty clear, that he won't be staying republican forever.