Go read the transcript of Senator John Kennedy (R-LA) questioning a nominee for Assistant Attorney General. In the manner of a kindly law prof conducting a Socratic master class on the law concerning nationwide injunctions, he gently demolishes the legal basis (hint: there is none) for the practice.
With kind words he lays out the lack of constitutional or common law underpinning for district judges to issue nationwide injunctions. These should only occur in the case of class action suits.
I hope the Supremes see it as he does, they certainly should. However, Chief Justice Roberts is unreliably conservative.