In a general election, Romney runs closest with Obama, trailing by three points -- within the margin of error. Obama leads Cain by six points and Perry by nine points.
Half of Americans, however, say Obama deserves to be voted out of office, compared to 46 percent who say he deserves to be reelected. It is the first time in AP polling this year that half said they thought he deserved to be voted out of office, though it has not changed significantly since the summer.
The Associated Press poll was conducted Oct. 13-17 by GfK Roper Public Affairs & Corporate Communications. Results are of 1,000 Americans -- including non-voters, and have a margin of error of +/- 3.1 percent. There were 431 Republicans and Republican-leaning independents, for a margin of error of +/- 4.7 percent.