State law prohibits voters from voting in more than one primary election held on the same day. Voters may not vote in both parties' runoffs. Furthermore, voters who voted in one party’s primary are not eligible to vote in the other party’s runoff. However, if you did not vote in either primary, you may vote in either party’s runoff. All South Carolina voters will fall into one of three categories:
Those who voted in the Democratic Primary and are eligible to vote in only the Democratic Runoff.
Those who voted in the Republican Primary and are eligible to vote in only the Republican Runoff.
Those who did not vote in either primary and are eligible to vote in either the Democratic or Republican Runoffs, but not both.
If you registered to vote by mail after January 1, 2004, are voting for the first time since that registration, and did not submit a form of identification along with your application, you will be required to show ID at the polls in addition to your voter registration card.