ILLINOIS

Primaries:

• Democratic congressional and state primaries: open
  

• Republican congressional and state primaries: open

• Democratic Presidential primary: mixed

• Republican Presidential primary: mixed
  

Primary Type Definitions

Registration:

• Illinois has nonpartisan registration. There is no option to affiliate with a political party on the voter registration form.

Details of voting in congressional and state primary elections:

• Voters are not required to register with a party to participate in the party primaries, but they do have to publically choose one party's ballot to vote. This is considered a public declaration and can be challenged by other voters.

• Voting history is also public information and records are kept.