General Discussion

It is specifically part of voter information which anyone can request in Texas (chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://www.sos.state.tx.us/elections/forms/pi.pdf).

Who you vote for is private, but your party affiliation (or primary party ballot) - among other things - is public information.

It always surprises me when people who are active in politics aren't aware that voting records are public (not who you voted for - but a whole lot of other information, generally including which party primary you voted in, every election you voted in, your address, when you registered, and your date of birth (in some states)).