Texas GOP labels themselves Communists as defined by 557.001 and are thus forbidden from running in Texas elections.
https://statutes.capitol.texas.gov/Docs/GV/htm/GV.557.htm
Sec. 557.001. SEDITION. (a) A person commits an offense if the person knowingly:
(1) commits, attempts to commit, or conspires with one or more persons to commit an act intended to overthrow, destroy, or alter the constitutional form of government of this state or of any political subdivision of this state by force or violence;
(2) under circumstances that constitute a clear and present danger to the security of this state or a political subdivision of this state, advocates, advises, or teaches or conspires with one or more persons to advocate, advise, or teach a person to commit or attempt to commit an act described in Subdivision (1); or
(3) participates, with knowledge of the nature of the organization, in the management of an organization that engages in or attempts to engage in an act intended to overthrow, destroy, or alter the constitutional form of government of this state or of any political subdivision of this state by force or violence.