WHEN George H.W. Bush lost his presidency after four years in office, he blamed Alan Greenspan for not cutting interest rates fast enough in an election year. "I reappointed him, and he disappointed me," said Mr Bush of the Federal Reserve chairman. Janet Yellen cannot now be a let-down to President Donald Trump. She chaired her last meeting of the Fed's rate-setting committee this week; her successor, Jerome Powell, will serve beyond the next presidential election. On both counts-the change at the top and the type of replacement-America is setting a lead that others are likely to follow.
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