This is what GOTV can do for Obama -
http://fivethirtyeight.blogs.nytimes.com/
snip
In the regular, likely-voter version of our now-cast, Mr. Obama is estimated to have a 68 percent chance of winning the Electoral College in an election held today. But on the basis of registered voters, he would be a 91 percent favorite. Instead of being ahead in the popular vote by a hair over one point, hed be expected to win by around four. And hed be projected to win 322 electoral votes, rather than 291.
Its very unlikely, of course, that Democrats will turn out as high a percentage of their voters as Republicans do. The demographic groups that favor Democrats are just harder to get to the polls.
But if Mr. Obama can narrow Republicans advantage in this area reducing the gap between registered-voter and likely-voter polls to one or two points rather than three, he can get halfway there, and make Mr. Romneys task much harder.
snip
Get Out The Vote!