I am afraid it's already to late to save Texas (and I say this as the 7th generation Texan)
The invasion is nearly complete, and there is no stopping the inevitable now. Texas will turn blue in the next 10 years like California before it and for the same reasons.
Walk into any maternity ward in the state if you want to know why.
Folks on this thread are fantasizing that Texas will magically remain conservative. The Hispanic boys and girls who will turn Texas into Tejas are already here. They're just not old enough to vote.