From NBC's Domenico Montanaro
Of Obama's sweeping South Carolina victory, Obama Chief Strategist David Axelrod said, "This was a good, old fashioned butt kicking -- as we say in this business."
He credited turnout, which he said approached half a million people and Obama's broad support, including getting 24% of the white vote, according to exit polls. "He's bring new people into the party," Axelrod said, adding, "It's just a harbinger of things to come."
Axelrod also questioned the Clinton spin of trying to make Florida and Michigan relevant after all the candidates had signed pledges to not campaign there, including an afternoon memo on the topic.
"It is kind of curious," he said, smiling wryly. "We all agreed to the Democratic Party rules. We all signed a pledge.
"When that memo came out in the middle of the afternoon, I knew this would be a good day."