They are open, but you have to state whether you are voting in the Republican primary or the Democrat primary.
LOL...I told our poll workers, after they asked me that question, “Normally, Republican, but I’m not sure! I’m not too happy with them, right now”. They sort of chuckled.
It’s my understanding that the turnout is unusually low and that low turnout will definitely not favor Cornyn. Our family all voted for Stovall. Prayers up that Cornyn won’t even make the runoff.