Interesting Rasmussen Poll

http://www.rasmussenreports.com/public_content/politics/mood_of_america/partisan_trends

From the site (note that I would look for corroboration of this -- Rasmussen polls are always skewed towards right wing / conservative viewpoint -- although allegedly an impartial poll):

The number of Republicans and Democrats in the country is just about even. In fact, the gap between the parties is the smallest it has ever been in nearly nine years of monthly tracking.

During the month of September, 33.9% of Americans considered themselves to be Republicans while 33.7% consider themselves Democrats. For both parties, those numbers are up less than a single percentage point from August. As a result, the number of voters not affiliated with either party fell from an all time high of 33.5% in August back to 32.4% in September.