Sen. Kay Hagan (D-NC) has seen her prospects for re-election take a slight, but potentially pivotal, dip. For anyone with kids, that has done hard time in a Chuck E. Cheese or some similarly kid-themed restaurant burdened with a money-sinking arcade, the game "whack-a-mole" is probably quite familiar. For Democrats, that has to feel like these last few days (and perhaps even weeks) on the polling front.