. >> reporter: adam hasner is from florida. >> is there a chance that marco rubio could finish second in iowa on monday? >> i'm not going to play the expectations game. we definitely nomar company's going to have a strong showing. we've made strong commitment to iowa. he's been traveling the state event after event after event all week, through the weekend. we're going to keep working through monday night. >> reporter: these volunteers pay their own way, use their own phones, tell their own stories about why people should lynn collins is from tallahassee. >> people want to know the candidate. and if you're not meeting the candidate in person, certainly speaking to people who know him isn't a bad thing. >> i just wanted to remind you that the caucus is this monday. >> reporter: it's hard not to notice the youth movement in this campaign. shelby truett is 24. she has been working the phone for 12 hours. >> i'm actually here because my friend emily, we drove up together. >> so just for this? >> just for this, yeah. >> this is a round trip? >> i convinced my boyfriend, a rubio. he's been

. >> adam hasner is the co-chairman. for him and others, it is a 72 spript to the finish line. >> -- sprint to the finish line. finish second? >> we know he will have a strong showing. we've made a strong commitment to iowa. event after event after event all week through the weekend. so we'll continue working through monday . >> these volunteers pay their own way, use their own phones, tell their own stories about why lynn collins is from tallahassee. >> people want to know the candidate and if you're not meeting the candidate in person, certainly speaking to people who know him isn't a bad thing. >> i just wanted to remind you that the caucus is monday. >> it is hard not to notice the youth movement in this campaign. shelby is 24, working the phone for 12 hours. >> i'm here with my friend emily. we drove up together. >> so just for this? >> just for this. this is your road trip. >> i convinced my boyfriend, who is a liberal, and he is now voting for marco rubio and he has been campaigning with me. >> you're that convinc