He's leading everywhere except New Hampshire, and I imagine he's only behind in New Hampshire because Romney is from a neighboring state.
NATIONAL (Fairleigh Dickinson): Gingrich 36, Romney 23, Cain 8, Perry 6, Bachmann 4, Paul 4, Santorum 3, Huntsman 2
NATIONAL (Gallup): Gingrich 36, Romney 23, Paul 9, Bachmann 6, Perry 6, Santorum 3, Huntsman 1
NATIONAL (YouGov/Economist): Gingrich 31, Romney 15, Paul 11, Perry 9, Santorum 7, Bachmann 6, Huntsman 6, Johnson 2
IOWA (CNN/Time): Gingrich 33, Romney 20, Paul 17, Perry 9, Bachmann 7, Santorum 5, Huntsman 1
FLORIDA (CNN/Time): Gingrich 48, Romney 25, Paul 5, Bachmann 3, Huntsman 3, Perry 3, Santorum 1
NEW HAMPSHIRE (CNN/Time): Romney 35, Gingrich 26, Paul 17, Huntsman 8, Bachmann 3, Perry 2, Santorum 2
SOUTH CAROLINA (CNN/Time): Gingrich 43, Romney 20, Perry 8, Bachmann 6, Paul 6, Santorum 4, Huntsman 1
And, of course, the president would thoroughly crush Gingrich by huge numbers (50-42 according to PPP, for example) if he's the nominee, so...
Go Newt!