klobuchar are steering the conversation to the middle, saying it's critical to appeal to a broader swath of voters. >> you want to put someone on top of our ticket that brings people with them and doesn't shut them out. >> not a joke. >> reporter: the message is resonating with katie, an independent voter who plans to take part in the iowa caucuses for the first time because of her disdain for trump. what kind of democrat are you looking for? >> i'm looking for someone that is moderate, that is a strong leader and has integrity. >> thank you. it's good to be back. >> reporter: she and her mother came to see biden when his bus tour passed through iowa falls. they hope the check out buttigieg soon. back in mt. vernon, willem's social studies classroom is decorated with posters from campaigns gone by. she said finding a candidate to motive democrats and win over trump voters is her chief concern. how often do you think about electability? >> often, and try and think of that middle third and how they might be persuaded to vote for the democratic ticket.