I think that Newt sees the bigger picture. Newt being a historian, sees a chance to man up to the position and become one of the all time great presidents. He knows that like Reagan, he would be remembered for his accomplishments rather than his checkered past, which, I think, is what appeals to him about the presisdency. His own place in history.
I can live with paul, santorum, or Newt.
Romney is a piece of trash and is the white Obama. There is not once inche between them.