jump in tomorrow. >> that will double the field to six candidates. how will it impact the primary? let's bring in john avalon senior commentator market hoover. great to have you guys. >> good morning. >> what do you think of dr. ben carson's o'noucement? >> today in detroit it's supposed to be a big event. here is somebody that is a folk hero, especially in baltimore. he's a renowned surgeon. >> that halo effect is faded as he has kind of played to the right wing base. it will be interesting to see what role he plays. >> let's look at the polls right now. this is our latest cn this-orc