But why would Sestak reiterate the charge last Sunday? He wouldn’t be playing a game with stakes this high unless he thought he held a pretty good hand.
He's stuck. He wouldn't say what the offer was or who specifically made it.
He can't simply said "I lied about it!" but he's not going to willingly supply any new information.
He may have a good hand, but it's not a card game he wants to be in anymore. He doesn't want to play against the Democrats now that he's one of them.