Man, that Nobel Peace Prize is sure impressing Americans, isn't it?

President Obama's approval rating in the latest Harris Poll has plummeted to 45%:

President Obama may have won the Nobel Peace Prize, but unfortunately, he is not winning accolades from the American public as his job approval rating continues its downward slide. In September, U.S. adults were split almost evenly on the job the President has been doing - 49% gave him positive ratings and 51% gave him negative ratings. This month, the number giving him positive ratings drops to 45% while over half of Americans (55%) give him negative ratings.

These are some of the results of The Harris Poll of 2,293 adults surveyed online between October 5 and 12, 2009 by Harris Interactive.

The approval ratings of the president by Democrats and Republicans are as one would expect with 77% of Democrats giving President Obama positive ratings compared to 14% of Republicans. Independents, however, are more down on the president as 60% give him negative ratings while 40% give him positive marks on his overall job performance.

The White House should also be concerned about weakness in some of President Obama's strongest supporters. During the election, Echo Boomers (those aged 18-32) were the strongest age group supporting the president. Now they are of mixed minds on his performance as just over half (51%) give the president positive ratings and 49% give him negative ratings. The oldest generation, Matures (those aged 64 and older) are even more negative with just 39% giving President Obama positive marks and 61% giving him negative marks.