California has a closed primary. You will need to register Republican to vote for Ron Paul.
To switch, simply complete and mail the voter registration form below.
Voter Registration Form
Or copy/paste the address into your browser:
California has open primaries ONLY for local elections. For the presidential primary you will need to register Republican.
In box #7, you may specify “Republican Party”
Registration Deadline: May 21, 2012 (Certainty: confirmed)
Primary Date: Jun 5, 2012 (Certainty: confirmed)