I was wondering why Supreme court issue was a surprise, since there should have been a case that raised this issue. Ah - its a Mississippi case about the ban of abortions after 15 weeks.
The whole State v Federal rights is a big issue. You get problems like this when the Federal govt can't pass a law allowing abortions and it becomes a state issue.
Sorry but the US system is very messed up and complicated. Australia gets similar issues with multi level govt - we have had it suggested to remove state govt, but that's easier for us with just a handful of states.