CINCINNATI (AP) - A federal trial set to begin in Cincinnati will examine whether Ohio's congressional map is constitutional.
Voter rights groups who sued the state say Republicans used a "partisan gerrymander" to ensure a 12-4 majority in Ohio's congressional delegation. That margin has held in every election since the remapping.
A three-judge panel is scheduled to hear arguments beginning Monday. The trial is expected to last more than two weeks.
The suit says the district maps violate voters' rights to democratically select their representatives.
The state has responded that since Republicans had a 13-5 advantage before Ohio lost two seats due to reapportionment after the 2010 Census, both parties each lost a seat. Ohio officials also note that a new census in 2020 will lead to a redistricting anyway.