My read is gerrymandering is happening. The Libs, who have done a better job at throwing money at lower circuit court races and wanted to shift power to challenge gerrymandering legally.
Republicans have stronger state legislatures and wanted the power to create election regulations in the place where they thought the Constitution assigned the power.
This ruling says no, the courts do have jurisdiction but they cannot override the role of making laws and regulations…the SL is still in the driver’s seat.
Read this (I can’t hold but I used asterisks):
The Supreme Court on Tuesday rejected the theory, with Chief Justice Roberts writing the Elections Clause "does not insulate state legislatures from the ordinary exercise of state judicial review."Justices Clarence Thomas, Neil Gorsuch and Samuel Alito dissented.
"In interpreting state law in this area, ••••state courts may not so exceed the bounds of ordinary judicial review as to unconstitutionally intrude upon the role specifically reserved to state legislatures by Article I, Section 4, of the Federal Constitution•••••," Roberts wrote.
My read is, courts still can do their job but nothing more. SL is still the governing body in election rules and laws.