Also thanking the media for expressions of condolence following the death of his grandmother, Obama acknowledged there had been "sometimes friction" between the campaign and the press.
"But you guys have been gracious and understanding," he said, following conservative criticism of the press for its coverage of Obama, as his plane prepared to depart after a huge rally in Virginia for Chicago.
"It's been a good long ride with all of you," the Illinois senator said. "Whatever happens tomorrow (Tuesday) it's going to be extraordinary and you guys have shared this process with us."