A recent movement among some Texas Republicans aims to close the Republican primary to only registered Republicans. This would be a change from the current open primary system, where any eligible registered voter can participate. Texas is one of the majority of states with open primaries, allowing voters to cast ballots regardless of party affiliation.

Further details on this proposal and its potential implications are available from the Odessa American, including an op-ed by Cornyn discussing the potential consequences of such a change.