特朗普这种膝跳反射式的本能保护主义对那些选他上台的工人阶级帮助不大，而那些心怀不满的国会共和党人以及那些在其他事务上支持他的企业可能会反过来遏制他。
Trump’s kneejerk protectionism does little to help the working class that helped elect him. Disaffected congressional Republicans and unhappy corporations that have supported him on other matters may yet rein him in.