RESEARCH TRIANGLE PARK, N.C. -- U.S. Senate candidates Erskine Bowles and Richard Burr battled Monday night over trade and health care, accusing each other of harming North Carolina workers and seniors. Each of the candidates, participating in a broadcast debate at the University of North Carolina television studios, charged the other with failing to represent the state's citizens. On the issue of trade, the Bowles accused Burr of continuing to support expanded free trade. Bowles, who helped advance free trade deals while in the Clinton administration and later as White House chief of staff, said he won't support additional treaties...