Even though Texas has a special claim for a gripe, secession by any state would be very difficult and costly.. A whole new government would have to be set up and international relations generated.
Then there would be tariffs and other considerations. Texas is fortunate, in that it is a border state and has ocean ports. A state such as Kansas, Missouri or Colorado would have more difficulty, trying to maintain any sovereignty, being land locked and dependent upon the other 49 for
international commerce.
Then of course, being a state that borders Latin America, raises another, costly problem. ..But of course, a common, woven fences with minefield between, could settle that..
I have dreamed of a western New York and western Pennsylvania, forming a new entity, without secession from the US..but even that is a high
hurdle to accomplish.
One interesting idea that was gaining traction in recent years, was Manitoba, joining the US. ..But withthe recent craziness of both US and
Canadian leaders, it looks like those efforts are on hold.