Politics is an industry in which ideas demonstrated to be ineffective and morally reprehensible live on long after they should have died. That's the case with President Donald Trump's fondness for mercantilism, as he espouses hoary old nostrums about the alleged benefits of hoarding money and preventing Americans from using their capital to purchase desired goods from other countries. Like a throwback to the 18th century, the president mistakes accumulating the means of exchange for building actual prosperity, as if we'd all be better off with overstuffed wallets than with the things our funds can purchase.
