Fro Front Runners News Today

Msnbc political contributor, david jolly. daniel, weve all been through that in some way or the other. going down the road, stopping a candidate trying to get the most out of him as they do make their way to "a" to "b" and you heard the question that vaughn was asking, and that had to do with the polling numbers in iowa. and bernie sanders dropping seven percentage points since april. while you see elizabeth warren jump 12 percentage points. whats happening there in iowa that explains why sander...