and he may be betting that the economy is recovering so strongly right now that it can actually withstand these shocks more than ever. it's already rattling markets. but also relationships with canada, key allies in europe as well. tariffs of 25% for steel, 10% for aluminum. this is primarily aimed at china, which has been dumping cheap steel in america for many years. remember, hillary clinton accuseded then-candidate donald trump of benefiting from some of that cheap steel. this is a move aimed square at battle ground states. the president rested away from clinton 2016 and will need for re-election in 2020, such as ohio, the state where senator portman hails from. he agrees that these tariffs are essential to american national security and will in the long run protect some steel