RALEIGH, N.C. (AP) — The retirements of two veteran North Carolina Democratic congressmen have opened the way for robust primaries Tuesday for the shot to serve on Capitol Hill. Eight Democrats are running to try to succeed 4th District Rep. David Price, who won’t be on the ballot for the first time since 1986. And four Democrats are running for the 1st District seat held by Rep. G.K. Butterfield, who’s represented the northeastern region since 2004. Primaries are being held in all but one of 14 U.S. House districts that North Carolina is now assigned. Seven incumbents seeking reelection have primaries, including Republican Madison Cawthorn, who is facing the strongest in-party challenge.