In a major win for partisan map-drawers everywhere, the North Carolina state supreme court has ruled in favor of the state’s Republican legislators who are seeking to create new legislative maps that more heavily favor themselves. Although at first glance it appears to be a major win for the GOP, state courts across the country are also considering redistricting cases that could hand new power to the Democratic party.

On Friday, the North Carolina court ruled that state courts — like themselves — have no role in adjudicating the legality of district maps drawn by the state legislature. The decision is the first test of the so-called “independent state legislature theory,” which mandates state legislatures be the highest authority in setting the rules for elections.