Texas alone can, but that is only because Congress gave consent in advance.
It's unclear whether or not that's still true or if Texas lost that privilege when it was readmitted to the Union after the Civil War. It'd certainly go to the Supreme Court.
split texas up but make it so they're all R and send R senators to own the libs
I don't think you could get five reasonably sized GOP states out of TX. You could settle for a smaller number of states and do that, though.
Or make one super-Dem state and four safe GOP states.
