GOP presidential contender Herman Cain is surging in the polls, but his support of Alan Greenspan is unlikely to win approval from his Tea Party fans. At the Republican debate Tuesday night, Cain touted the former chairman as the best leader the Federal Reserve has had in the past 40 years, even though the controversial chairman has admitted that his decisions weren’t always right. “The way Alan Greenspan oversaw the Fed and the way he coordinated with all of the Federal Reserve banks, I think that it worked fine back in the early 1990s,” said Cain, who served as chairman...