What would happen if The US Army rushed in and crushes the “Rebellion”? General Millie leading the force of rainbow warriors and arrests or Shoots the Governor of Texas. Biden revokes the Texas State Constitution and it is treated as occupied territory and can not vote in the election. Trump could be blamed and not permitted to run for office due to the 18th amendment. And what would happen if an armed mob stormed the DC Jail and freed the Jan6 hostages? If Texas and the ten other states left the Union to form a new nation, Would Russia recognize the new nation? China? What if is a fun game to play but in real life its dynamite.
It's a long way from the Red River to the Texas border. Lots of ground to cover and lots of Texas rednecks with lots of guns and ammo.