In the survey, 47 percent approve of the job Obama is doing, down seven points since January. Half of all Americans disapprove of his job performance, with 37 percent saying they “strongly disapprove,” nearly matching the worst level of his presidency.

Driving the downward movement in Obama’s standing are renewed concerns about the economy and fresh worry about rising prices, particularly for gasoline. Despite signs of economic growth, 44 percent of Americans see the economy as getting worse, the highest percentage to say so in more than two years…

If the election were held now, Romney and Huckabee would mount the stiffest challenges, trailing Obama by four and six percentage points respectively, among all Americans as well as among registered voters.

Obama has double-digit leads over the other five tested — a dozen points against Trump and Rep. Michele Bachmann (R-Minn.), 15 against Newt Gingrich and former Minnesota governor Tim Pawlenty and 17 points over Palin.