From the New York Times:
Mr. Obama ... did not schmooze with Washington politicians. No one from the New Hampshire Congressional delegation traveled with Mr. Obama on the plane, a perk that presidents often offer to lawmakers to foster good will.Maybe he doesn't feel he has to play the game. Maybe he believes he's got the election locked up already.
Mr. Obama, in general, does not go out of his way to play the glad-handing, ego-stroking presidential role. While he does sometimes offer a ride on Air Force One to a senator or member of Congress, more often than not, he keeps Congress and official Washington at arm’s length, spending his down time with a small — and shrinking — inner circle of aides and old friends.