At a marathoner's pace, Pete Buttigieg has pulled ahead in the race for the Democratic nomination, and he's now a top contender. Being at the top has certainly caught the attention of many Iowans planning to caucus, both in gaining new supporters and drawing harsh criticisms about his past at the same time.

During this episode of River to River, host Ben Kieffer takes you to a town hall that was held on Friday, Dec. 6 in Grinnell. Over 550 people packed a small auditorium known as Harris Center on the Grinnell College campus. Buttigieg made his case for swaying the fellow caucusgoer, and took about half a dozen questions from the audience.