COLUMBUS, Ohio — The ACLU filed a constitutional challenge to Ohio’s congressional map on Wednesday, using Republican Gov. John Kasich’s statements opposing gerrymandering as ammunition.

A suit filed in U.S. District Court in Cincinnati challenges district maps in effect through 2020 for “an unconstitutional partisan gerrymander” that violates voters’ rights to democratically select their representatives. The action is not intended to impact the maps used in this fall’s elections, but it could have an impact on maps for 2020.

“The current Ohio map is one of the most egregious gerrymanders in recent history,” the suit states. “The map was designed to create an Ohio congressional delegation with a 12 to 4 Republican advantage — and lock it in for a decade.