Illinois House Republicans filed a lawsuit over the Democratic-drawn legislative map, arguing it violates the state Constitution.

Republicans in the Illinois House say the state’s current legislative map is unconstitutional and illegally favors Democrats, and the GOP is asking the state’s Supreme Court to intervene.

A lawsuit has been filed with the Illinois Supreme Court in an effort to throw out the current legislative maps that the plaintiffs said are the result of extreme gerrymandering. The complaint, filed by State Rep.