This Gallup opinion poll of past presidents shows what you'd expect from a liberal poll, that JFK was the greatest president of modern times.

JFK 85%
Reagan 74%
Clinton 69%
Bush Sr 64%
Ford 61%
Carter 52%
Johnson 49%
George W. Bush 47%
Nixon 29%

I was surprised at the tendency for past presidents to have their numbers improve over the years after they left office.


Obama's popularity has been hovering at around 46% since the mid-term elections. I'm frankly amazed to see his numbers remain that high.
Although I've seen Obama poll lower in other surveys.