Predict the Nov result and explain why

[zorkpolitics]

I predict a Romney win over Obama by 4%.

The RealClear average of polls has Obama leading by 1.3%, but I think the current polls are vastly oversampling Democrats because:
1) Gallop finds Democratic enthusiasm down from 2008 by 22% points while Republican enthusiasm is up 16% points: A larger Republican advantage than in 2004
http://www.gallup.com/poll/156194/Democratic-Voting-Enthusiasm-Down-Sharply-2004-2008.aspx?utm_source=add%2Bthis&utm_medium=addthis.com&utm_campaign=sharing#.UBAzQkU7QFU.twitter
2) Rasmussen finds Democratic party self identification down 11% points from 2008:  a 3.4% advantage for Republicans over 2004
http://www.rasmussenreports.com/public_content/archive/mood_of_america_archive/partisan_trends/summary_of_party_affiliation

Combining the two trends I predict a substantial Romney win by 4% = to the Bush 2004 win of 2.5% plus another 1.5% for increased Republican self ID and enthusiasm.