As Barack Obama attempts to salvage some form of health care reform with a prime time speech to a joint session of Congress, a new Associated Press-GfK poll says 52 of Americans oppose Obamacare.

The poll also finds Obama's job approval numbers heading south.

From The Associated Press:

With his health revamp moving slowly and unemployment edging ever higher, Obama's overall approval rating has also suffered a blow. The survey showed that 49 percent now disapprove of how he is handling his job as president, up from 42 percent who disapproved in July.

The grade people give Obama on health care also has worsened since July, when just 43 percent disapproved of his work on the issue.

The poll underscores how the president has struggled to win public support to reshape the nation's $2.5 trillion health care system and to put the brakes on a deep recession.

Forty-nine percent say they oppose the health overhaul plans being considered by Congress, compared to just 34 percent who favor them.

Obama's marks are also poor on the economy, with 52 percent saying they disapprove of how he's handled that issue.

A similar number disapprove of his handling of taxes, some of which may rise to help finance his health overhaul. And 56 percent dislike his handling of the budget deficit, which has skyrocketed under the costs of the financial bailouts and a recession that has caused sinking federal revenues.

Read more poll results at http://www.ap-gfkpoll.com/