By a vote of 42 to 13, Senate Democrats have voted to allow the turncoat Sen. Joe Lieberman to retain his chairmanship of the powerful Homeland Security Committee. Of course, if Leiberman had done the same kind of thing to a mafia don that he did to Barack Obama at the Republican National Convention, we all know what would have happened. But then Obama, in forgiving and supporting Lieberman, has observed a legendary mafia rule — “Keep your friends close, but your enemies closer.”