nice day probably changes the outcome. cal perry, our colleague in iowa city joins us. he has an update. cal. reporter: hey, so we re now in precinct 4. we were in precinct 3. this is the adult table. this is a new record for precinct 4. 481 people were registered, 106 new registrations. your viability number for this field house is 108. so what s happening now for the next 25 minutes, people are breaking into groups. if you have 108 people, you re viable. if you have 107, you re not viable and you re desperate to be on tv. i m desperate to talk to you. reporter: who are you supporting? i m supporting elizabeth warren because i think she has the best chance to beat donald trump. the last year all these people have come to town. if you live in iowa and you want ....