

Different states have different rules on who can run in a primary, with some states being very lax and letting anyone who can run no matter party affiliation. Also, in some states, people can vote in any party regardless of party affiliation.
This was done as several states recognized that the two party system didn’t always produce the best candidate. Instead of creating systems allowing for more parties, these states created systems that weakened the power of that state’s or the counties’ political parties.










In party primaries, which are used to some states, the election of the party’s candidate in some states is a public election where anyone can vote, even people from other parties. Dove states require you to auto register for that party, but not all of them.
So your party’s candidate gets chosen by everyone, not just members of your party.