(And the ruling may include state districts, too, which has been a hurdle the cities like Detroit that has been required to be governed under the state's "town manager" law, and Flint which has not been able to have its disastrous water problem fully-addressed..)
The decision came as a result of a lawsuit by the Michigan League of Women Voters. The Democratic Secretary of State (elected during the recent Blue Wave) offered Republicans a more modest settlement, but they turned it down, choosing to let the panel of judges decide. Michigan Republicans said they will appeal the decision to the Supreme Court -- though last year the Supreme Court ruled in favor of two lower-court decisions in favor of redrawing districts in Pennsylvania and Virginia.
You can read the full story in more detail here.