In many states Greens, Libertarians, and other third parties conduct primaries to nominate their candidates.
Some states' party primaries allow participation from registered Independents, or members of other parties. If you are a registered Independent and would like to vote in a party primary please indicate that party on your voter registration form.
You may wish to contact your election official to find out whether your party is conducting a primary or if not, whether you can vote in another party's primary. Election official contact data is available in the Election Official Directory on this website.
Secretary of State and/or Board of Elections office contact information is available in the State-specific Voter Information Directory on this website. The Secretary of State and Board of Elections websites should have the most up-to-date information regarding which parties are holding primaries in your state.