Respondents were less likely to describe Obama's leading Republican challengers as "too conservative," Gallup said. Only 38 percent said former U.S. Sen. Rick Santorum of Pennsylvania is too far to the right, and 33 percent said that of former Massachusetts Gov. Mitt Romney.
In 2008, when Obama had not yet won the Democratic nomination, only 37 percent of respondents to a poll called him too liberal, Gallup said.
Almost nine out of 10, or 89 percent, of Republicans surveyed called Obama too liberal. But only 55 percent of Democrats said Romney is too conservative and 50 percent said that of Santorum.
Half of independents say Obama is too liberal.
Obama gets more support from within his own party with 69 percent of Democrats saying his views are just right. Only 61 percent of Republicans say that of Romney and Santorum.
Gallup conducted a telephone survey of 1,014 adults Feb. 16-19. The margin of error is 4 percentage points.