washington successful conclusion trans pacific partnership trade talk remain top legislative item unite state top economic adviser president barack obama say tuesday white house national security council adviser christina segal-knowles tell news conference ahead sept. 4-5 g20 summit china talk trade pact europe still progress despite comment france germany doubt asian talk stall congress democrat hillary clinton republican donald trump say would approve deal current form elect president november segal-knowles say corporate tax issue would g20 agenda china although ask whether european union tax rule apple inc deal ireland would discuss directly address issue face company pacific trade pact remain top issue obama administration