>> shepard: i'm shepard smith. this is the fox report. it's the bottom of the hour, time for the top of the news. 90 minutes to go until we have decisions. 90 minutes at least until the polls close in michigan and arizona. and even as mitt romney says he will probably win most of the dels tonight, rick santorum is threatening a primary shocker. a live look at mitt romney election headquarters in michigan where he should have home field advantage and in a big way. rick santorum is giving him a run for his considerable money and they have been neck and neck down the home stretch. we have team fox coverage tonight, our correspondent john roberts is live in phoenix where we are watching things and they appear to be improving for mitt romney. first, let's get to mike tobin who is live at santorum primary headquarters tonight in grand rapids, michigan. what do republic voters say is motivating them the most to go to the polls tonight, mike?