If Trump really wanted to bankrupt Russia, he does not need tariffs. All he has to do is prevent American banks and financial institutions from doing any business with companies and even countries that defy sanctions. Might start a war or a depression but it would work.
WHY NOT GO ALL THE WAY TO A NAVAL BLOCADE. AFTER ALL, THAT WOULD BE NOTHING MORE THAN ‘BONE CRUSHING SANCTIONS WITH TEETH’, EH?