obama a building his lead. president beating romney 44-42. he also wins against santorum of course 50-37. here's a key. a regularly republican state, obama beats romney 47. 41. if he wins there, he probably wins it all right from that. a similar margin facing rick santorum, 47-40 in ohio. key race here. pennsylvania, tighter. obama still leads. he tops romney 45-42. that's margin of error stuff. 45-42. very close. rick santorum who's from pennsylvania, 48-41. john heilman is national affairs editor for "new york" magazine. the great joe klein is "time" magazine's political columnist of record. joe, i want to start with you. look at these numbers. i guess all of the numbers look good for obama though. i have somewhat chasened by the pennsylvania number. that looks like within the margin of error. i think romney has appeal with those philly and pittsburgh