Can Trump make the U.S. a ‘global subsidy cop’?

Has Trump actually come up with something right to do with trade? Are global subsidies a bad thing? Should we complain if other countries subsidise their industries? If other countries want to subsidise our consumption of imports should we care? Scott Lincicome argues that if the U.S. wants to end the practice of other countries subsidising key industries, it would require the U.S. to clean up its own business giveaways.