welcome back to "morning joe." a lot to talk about at the top of the hour. a debate tonight. another republican debate. so much going on. a new round of polls that show very interesting race, of course. we also have donald trump breaking attendance records set by elton john out in illinois. we have bush going after rubio. and we, of course, have ben carson desperately trying to prove to america that he stabbed somebody and hit his mother over the head with a hammer. who do we have around the table to discuss these most important pressing points? >> i don't know if either of these gentleman attacked anyone with a hammer. mike barnicle, the star of the