I’ve been watching, basically he rants about China, talks about how he’d ‘get tough’ and blathers about not being a whipping post. His rhetoric is emptier than Obama’s, and now that he’s on the birther train it’s the only thing anyone asks him about.
He’s not a serious candidate and the more attention paid to him the worse for the rest of the field, because they will be compared to him, which will make them look silly.
The recent polls says Trump is a big contender. You get to find out in June when his TV show "The Celebrity Apprentice" ends if Trump is a serious candidate. He has to wait by law until then to announce his presidential candidacy or pull the TV show. One or the other.