Having lived in TX for over 20 years (15 in El Paso), and married into a huge Hispanic family (10 kids, and now 15 grandkids), I can only offer my life experience as tangible evidence.
When I started dating my bride, every one in her family was a staunch Democrat, and would NEVER vote for a Republican. A typical Hispanic family is rigidly patriarchal. However, as my brothers and sisters in law grew up, went to school, and went out in the world, they learned that today's Democrat party is decidedly NOT their father's Democrat party.
As a result of their maturation (and hopefully, my vociferous stands on less government and more freedom), none of them (including my mother-in-law!) considers themselves to be a Democrat any longer.
I understand this is but a limited experience. I only offer this as a contrast to our lily white brethren who have already written Texas off as another state of Aztlan. For too many native Texans (sorry, I'm only naturalized!), Texas is unlike any other place on earth. Those who wish to live the Texas experience and share Texas values (freedom, self-reliance, etc.) are welcomed with open arms. Those who are only imposters generally find Texas to be a hard, cold place to live.
That's my view of Texas, like it or not!