CINCINNATI — A seemingly offhand utterance from President Obama has turned into a major point of contention between the two campaigns, as Team Obama tries to explain what the president meant when he told a crowd of supporters that “Voting is the best revenge.”

It happened in Springfield, Ohio Friday as Obama was discussing the economic policies of the 1990s.  When Obama referred to “a Senate candidate by the name of Mitt Romney,” the crowd booed his opponent’s name — certainly not unusual reaction at political rallies of both parties.  Then Obama said, “No, no, no — don’t boo, vote.  Vote.  Voting is the best revenge.”