“But try it in practice, and General Sherman will come knocking at your door.”
Kinda, kinda not. Iraq is about 65% the size of Texas. Afghanistan is about the same. They tied us down a couple of decades and we left in defeat disguised as stalemate.
The US military is utterly too weak to conquer Texas.
And for extra fun, about 12% of the military comes from Texas.
If Sodom on the Potomac decides to invade Texas, it might not go the way they think.
The military has not waged war since we dropped the bomb, that is why we can't win, not weakness, just weak leadership.