Future of Trump Trade Policy  The U.S. has lower tariffs and fewer nontariff barriers than most other countries. The theory of Trump trade policy has involved an eye for an eye – imposing tariffs to leverage more equitable treatment. It has not worked well. South Korea, Canada and Mexico were turned, but most other countries have simply reciprocated in kind. If tariffs are punitive and harmful, it is apparently only at the margins. New Delhi is being forced to accept the loss of its nonreciprocal benefits under Generalized System of Preferences (GSP), but India is among the top 20 least trade-dependent, developing countries. The latest threat of tariffs on Mexico for failing to secure the southern side of the border with the U...