If you live in any major city in Texas you are more than likely to have majority Democratic Party support (like everywhere else in the US). We are a low voter turnout state (30M pop,18M registered, 11M voted) and a one-party state, with the GOP controlling State politics for 30 years. This total control by the GOP has resulted in such intense gerrymandering that most people realize that their vote "really doesn't count" in their district, and that attitude carry's over to statewide and national elections.
The demographics say that we should be a purple state -
White 39%
Hispanic 39%
Black 12%
Asian 5%
Mixed race 3%
Texas has one of the youngest populations in the country, with a median age of 35 and you would think that would mean more Democratic voters, but most do not vote? Voter laws in Texas are among the most restrictive in the country.
I personally think there is a lot of "herd mentality" involved - lack of civics education in public schools and generational influence.
"Texas occupies a separate place in the American psyche, having once been an independent nation that defeated a foreign power in a war. To this day, Texas is a nation unto itself and the most independent-minded of all the states."
Add to that, East Texas, might as well be part of the Deep South in terms of attitudes.
It's strange for someone not born here, but it is real, and it is obvious even in our State Government decisions.
The summers are brutal, the politics are repulsive, but lots of jobs and very business friendly.