The__________ caucus, the nation's first and most famous caucus, requires that people attend a meeting of about two hours in which they indicate their preferences and then try to convince those who are undecided to join their candidate's group.

The Iowa caucus, Iowa’s most famous and first caucus, compels that people attend a meeting for about 2 hours wherein they express their preferences and then these people try to convince others who are undecided to join the group of their candidate.

The meetings typically happen in churches, schools, public libraries or even individual’s houses and the caucuses are done every 2 years.