by Patrick Appel
Public Policy Polling, a firm that does work for Democrats but is typically on the money, tests four possible presidential candidates against Barack Obama. The poll doesn't assume that Mr Obama is incredibly popularit gives him a 55/38 approval/disapproval rating, worse than the average calculated at Pollster.com. Still, all of the possible Republicans trail the president. Mike Huckabee fares best, only losing by 13 points in a hypothetical matchup.