Texas has it written into their state constitution - they CAN secede.
Many people are ready to ‘escape’ to Texas should they ever do so. they ARE big enough, and successful enough - and have the ba*ls, to be separate.
That is a commonly believed myth. There is nothing in our state constitution about the right to secede.
In the 1845 annexation agreement, Texas agreed to join the union on the condition that it be allowed to split itself into as many as five separate states whenever it wanted to, and contingent only on the approval of its own state legislature.