In a 6-3 decision, SCOTUS rejected the notion that state legislatures have unlimited power to determine the rules for federal elections and draw partisan congressional maps without interference from state courts.
How much effect will this have on existing congressional maps and upcoming elections?
It’s difficult to overstate how disastrous a ruling in this case going the other way could have been, on top of the corrupting influence of large amounts of money already involved in politics and how gerrymandered districts already are.