Morning, live from the Mars Cafe in des moines, iowa. Republicans here getting set to brave life threatening temperatures, sub zero windchills to cast their ballots in the closely followed caucuses to today. At stake, iowas 40 delegates and probably more crucially, momentum heading into the new hampshire primary, and of course, as we know, iowa is an expectations game. So where do we start here . Donald trump, the far and away front runner, hes really taken so much suspense out of the caucuses here. 50 , if he is over 50 , that is exactly what is the expectations that his team, honestly, they have been trying to lower. If hes above 50, nothing about this race changes. If he starts to creep below 50