Not really, you have no way of knowing if the people who voted for him were republicans. Neither does Texas, they don’t do party affiliation officially and primaries are open.
- Texas has nonpartisan registration. There is no option to affiliate with a political party on the voter registration form.
Details of voting in congressional and state primary elections:
Voters do not declare affiliation with a party in order to vote in the primary elections, but they must choose one party’s ballot.
Voters are only tied to party affiliation within the election cycle if there is a runoff.
Texas voters are not held to past affiliations from election to election.