If they seceded I’m sure the federal government would make the argument that they are on federal land, even if it’s within the Texas borders. Since it wasn’t state land, their secession wouldn’t apply so it would remain the USA. If Texas wanted to refuse the US Federal government access to them, they’d learn a swift lesson. Texas has a lot of guns, but the army has more.
If they seceded I’m sure the federal government would make the argument that they are on federal land, even if it’s within the Texas borders. Since it wasn’t state land, their secession wouldn’t apply so it would remain the USA. If Texas wanted to refuse the US Federal government access to them, they’d learn a swift lesson. Texas has a lot of guns, but the army has more.