I think you are totally miscalculating. This is not for the Left. This is for older, white, fringe democrats and undecideds. This is not about Romney, it’s about Obama.
If the Left brings it up, which they likely will, it only draws attention to this jive-talking, divisive Obama. This can only hurt Obama because it gives those wobbly moderates another thing to feel uncomfortable about. And it shows the blatant lack of vetting the media has done.
Gingrich is using it to contrast...he is using it much better than Hannity and Tucker did.