In any US presidential election campaign, you can be sure that protectionism will break in, as it has. But America's swing back toward protectionism started long before, with President George W. Bush's steel tariff of 2001.
又到了秋后算账的时候。在任何一届美国总统竞选期间，保护主义都会一如既往地乘虚而入。但这次保护主义在美国卷土重来早在2001年乔治·W·布什总统征收钢铁关税时就开始了。