This was predictable and inevitable. But the timing (the ad is dropping on the day Gingrich is set to exit the race) is a clue to the ruthlessness and aggressiveness of Team Obama.
There is also a humorous quality to this. On the YouTube page, the ad is titled: “Frankly, not Mitt Romney’s biggest supporter” — a frankly obvious reference to one of Gingrich’s verbal crutches.
Exit question: In the short-term, whom does this hurt more: Romney or Gingrich?