[The_Victor]

Just curious, but could a candidate run simultaneously in the GOP primary and in some other (Constitution, Green, ...) party's primary?

I would expect party rules to prohibit that, but you never know with the GOP.

[ziravan]

You could only run in two Primaries and be on the Nov ballot if you won both. Lose one, and you are barred from being on the Nov ballot as a Primary loser.

Now. If Texas had a system like NY where the Conservative Party sometimes endorses the Republican candidate, that would work. A Conservative Party nominating by convention after the Primary could nominate another Party’s primary winner. Just not a loser.