The Iowa presidential caucuses are conducted by the political parties and not by our office. You must be registered to vote to participate in the caucuses, but you may register or change your registration at the caucus site. You must register with the party whose caucus you attend (only registered Democrats can participate in the Democratic caucus, only registered Republicans can participate in the Republican caucus). The political parties also hold caucuses in non-presidential years to elect precinct chairs and other party officials, discuss party platforms, and conduct other business. The parties are not required by law to hold their caucuses on the same date, but have traditionally done so.