washington departure friday steve bannon white house top economic nationalist likely tip trade policy scale favor trump administration globalist faction could soften stance toward two trump favorite target china north american free trade agreement news trump fire bannon post chief strategist trade experts say may take time national economic council chairman gary cohn treasury secretary steven mnuchin agriculture secretary sonny perdue start win debate trade policy bannon white house trade manufacture office director peter navarro often ally take hardline anti-china stances currency manipulation steel tariff trade issue often oppose cohn mnuchin perdue accord lobbyists involve debate cohn-led group prove influential administration decisions april label china currency manipulator renegotiate north american free trade agreement instead terminate recently push delay decision imposition broad steel tariff bannon go replacement voice internal debate say senior administration official authorize speak publicly issue without steve constantly push back every policy idea come call globalists easy see could chance start win policy battle official say short term trade policy trajectory change much say derek scissor china trade expert american enterprise institute pro-business conservative think tank washington many trump view trade pre-dated bannon arrival campaign case u.s. trade representative office announce friday proceed plan investigation whether china misappropriate u.s. technology intellectual property unreasonable investment rule scissor say bannon departure show decisions administration make follow year-long study issue final choices go forward difficult sanction chinese look make tradeoff security issue bannon would first camp scissor say struggle influence trump white house something battle finance guy economic nationalists important economic nationalist leave scissor add offices ustr robert lighthizer commerce secretary wilbur ross push strong trade policies reduce u.s. trade deficits china mexico countries decline comment bannon departure refer policy question white house industry lobbyists whipsaw economic policy twist trade ill-fated border tax proposal skeptical much would change two lobbyists sideline nafta talk washington say even without bannon assume status quo trade policy long fierce china critic navarro white house bonnie glaser senior adviser asia center strategic international study say administration efforts develop effective strategy retaliate china unfair trade practice survive largely widely hold view administration corporate sector china trade practice problem doubt effort evaporate though may evolve say bannon departure tip trade scale favor white house 'globalists