Democratic voters challenge Ohio congressional district map

A group of Democratic voters asked a federal court on Wednesday to throw out a Republican-drawn map of Ohio's 16 U.S. House of Representatives districts, saying the boundaries were devised to entrench Republicans in power in violation of the voters' constitutional rights.Democratic voters from all of the districts filed suit in Cincinnati against Ohio Governor John Kasich and other Republican state officials over a practice called partisan gerrymandering.The U.S. Supreme Court is due by the end