the latest polls show it's too close to call. senator blanche lincoln is seeking her third term as the democratic senator from arkansas but she's in a hot primary race with bill halter. lincoln spent five times more than she raised in april and president obama has endorsed her. a mason-dixon poll released shows lincoln with a 12-point lead over halter. and there's an open race in kentucky's republican primary where senator jim bunting is retiring. he supports rand paul, who is the son of ron paul. a recent poll shows the younger paul up by 12 points over trey grayson. grayson, seen as the establishment candidate, was endorsed by senator republican leader mitch mcconnell. can these anti-establishment candidates pull it off? if they do, can they win in november? questions for our political panel, the "washington post" chris cillizza and "hotline's" amy walter next.