California's closed primary will be held on March 3, 2020.

The Secretary of State chooses who will be on each party's Presidential Preference ballot.

A candidate not chosen by the Secretary may petition to be placed on the ballot.

A closed primary means you must be registered to vote as "affiliated" Republican.

The deadline to register, or update your party "affiliation" is February 17, 2020

Register to Vote! or update party "affiliation"