President Trump on Friday morning threw barbs at Trump-appointed Federal Reserve Chairman Jerome Powell, against whom he’s railed over and over again in recent months due to the Fed’s refusal to cut interest rates. The central bank’s decision not to do so, however, seems to rest ultimately at the feet of Trump’s economic mismanagement, as Powell said earlier this month that the Fed would have lowered rates this year were it not for Trump’s tariffs . But as TNR’s Timothy Noah observes , Trump