two north carolina congressional district racially gerrymander 2011 redistricting must redrawn within two weeks u.s. appeal court panel rule friday order write fourth circuit court appeal judge roger gregory bar elections majority black district 1st 12th new map approve north carolina congressional primaries schedule march 15 court find congressional district 12 draw 2011 congressional redistricting plan unconstitutional gregory write rule say race main factor republican-controlled legislature redrew boundaries state lawmakers justify use benchmark three voters file suit 2013 invalidate district represent democrats g.k. butterfield 1st alma adams 12th state senator bob rucho house member david lewis guide redistricting plan legislature quote raleigh news observer website say would appeal rule three-judge panel judge find two north carolina congressional district racially gerrymander