mr. trump, you can't say that. >> i'm telling you, conan, speedy gonzales ran right at me. >> those are all offensive stereotypes, hold on, stop talking, my assistant just brought me a print out of my stereotypes. >> wait a minute, that's ridiculous. >> okay, look, larry, get in there. get conan out of there. i'm tired of this. this is getting nowhere. this guy is a loser. >> this is my show. >> i can't don't care, you're fired. >> the only thing wrong with that is that guy was rougher with conan than trump's guy was with what's his name. >> welcome back to "morning joe." we have mark here. >> and eugene robinson is still with us. moderator of "meet the press" is joining us this morning. >> chuck, a lot to talk about this morning. why don't we jump right in. >> the new quinnipiac poll finds hillary clinton leads the field with 45%, down from 55% in july with senator bernie sanders at 22% and vice president joe biden at 18%. on the republican side, donald trump has climbed 8 points since july to 28%, a big lead over second place ben carson. and a three-way tie for third between jeb bush, ted cruz and marco rubio.