Sowell is partially right on this one. Obama won this one on ground game. Obama had no record and went on the attack from the word go. Obama kept his campaign offices open in the swing states since the 08 election. Those offices brought several new voters to the polls, usually young, single female, or minority. These folks voted invariably for Obama. If these usaul non-voters had stayed home, then nearly all the swing states would have gone to Romney. Also, it appears 3 million regular Repub voters stayed home. Now this was likely the choice of candidate and not how nice he was. So if the Dems keep the coalition of the willing together, then the Repubs need a huge increase in participation and ground game. It came down to tactics.