- South Carolina GOP sued to end the state's open primaries, arguing non-Republicans shouldn't be able to influence the party's nominee (citing First Amendment and equal protection claims).
- The party adopted rules to limit primary voting to registered Republicans and to require candidates to be party-registered 90 days or show recent caucus participation.
- Legislative efforts to close primaries have stalled, and the dispute is now in federal court with the state election commission yet to respond.
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