Does this require a 2/3rd's majority to pass? Would this not be a hard sell in a divided house?
In the Senate, yes.
I don't expect it to pass. But, a lot of legislation is introduced with no real hope of being enacted.
I haven't yet looked at the voting patterns in the state senate districts of those that ran way to NM. But, unless the shift in voting patterns of Texas is reversed, I expect there will be the votes to pass it in the future.