Primaries:
- Congressional and state primaries: Open partisan w/ partisan registration
- Presidential primaries: Open
PRIMARY ELECTIONS STATE BY STATE
Iowa
Registration:
Voters may or may not choose to affiliate with a political party, however, affiliation with a party is required to vote in primary elections.
36% of Iowa voters are not affiliated with a political party.
Details of voting in congressional and state primary elections:
- Voters must be registered with a party in order to vote in a primary or caucus, but voters are allowed to change affiliation before the primary election or at the polls on primary day.