WASHINGTON (AP) — The hardest sell for President Barack Obama will be persuading members of his own party to back a bipartisan agreement on global U.S. trade policy. Longtime divisions in the Democratic ranks broke open Thursday when top congressional lawmakers finally reached a long-sought deal that would pave the way for the broadest trade policy pact in years. Orrin Hatch, R-Utah, and Ron Wyden, D-Ore., and Rep.