republican-led senate finance committee thursday set oct. confirmation hear gregory doud president donald trump nominee top agricultural negotiator job u.s. trade representative approve panel confirm full senate doud would become chief agricultural negotiator agency position u.s. farm sector criticize congress white house leave empty amid current negotiations modernize north american free trade agreement nafta doud would give rank ambassador agency president commodity market council trade association commodity futures exchange previously kansas farmer work senior aide u.s. senate agriculture committee spend eight years chief economist trade group national cattlemen beef association doud nominate white house june follow month dozens food agriculture trade associations company send letter committee members urge confirm doud administration congress push begin work nafta senate panel set hear agriculture trade negotiator nominee