Because the state conducts an “open” primary, voters last month were able to pick their choice of ballots regardless of any political affiliation. Not so for the July 22 runoff. As a voter, you must stick with the party ballot you chose for the main primary May 20. (In other words, you can’t cast a Democratic ballot in the main primary and then vote in a Republican runoff.) Important: If you did not vote in the primary, you may still cast a ballot in the runoff. And you can pick the party ballot of your choice.