“And where all you turn for trade?”
Texas already exports more high-tech goods and services than any state, including that one that has silly con valley.
If Texas were its own country, it would be the 6th largest oil producing nation in the world. The Texas-less USA would need some of that oil, especially since it depends on it right now.
The Texas-less USA would need Texas more than vice-versa.
But those industries would be burned to the ground. Sherman taught us the formula.