I hear you, but it has popped up at late as 2012 again, and I have looked everywhere to see concrete evidence that it cannot be done.. If anyone can point me to definitive evidence that is is not legal, I'll go take my nap.. LOL
Texas could secede. The Republic of Texas joined the United States as a sovereign nation via a treaty. All parties to a treaty have the right to nullify a treaty. There is a procedure that must be followed but Texas can legally nullify the treaty which binds it to the USA. Also the USA could nullify the treaty binding Texas and Texas would then be expelled from the union. Texas, via the same treaty, has the right to divide in 5 separate states and could then sent 10 senators to DC instead of just 2.
Texas has lots of options but as you point out, with the masses of northerners flooding Texas we will most likely be a blue state in the near future. Already the once solid red Harris county (Texas most populace county) has turned blue.
When it gets right down to it, does it really matter if it’s legal or illegal?
The American Revolution was illegal. It was also necessary at the time.