Personally I think Texas would have ignored any court ruling against the execution and killed him anyway. 10th amendment rules.
With a Supreme Court ruling on a specific issue? I’m not sure about that, with the threat of Holder getting into the mix.
I think at the least it would have stayed the execution for an appeal. But I think the greater issue is we dodged a bullet from international influence on our sovereignty.
If there was a key word needed on FR in order to highlight similar posts, it is: SOVEREIGNTY. We lose that, all other issues don’t matter.