CARY, N.C. (AP) — A former congressman will no longer seek an open U.S. Senate seat in North Carolina next year now that fellow Democrat Roy Cooper is running for the post. Tuesday's announcement by ex-U.S. Rep. Wiley Nickel came the day after Cooper, a former two-term governor, kicked off his own campaign to succeed retiring Republican Sen. Thom Tillis with a video message. Cooper's past popularity, name recognition and fundraising ability made him the party's front-runner overnight.