Repetition is the mother of pedagogy, my friend. We may know, but there are—trust me on this—millions of Americans who don’t know, and are only starting to become aware because new media keeps hammering.
Also because the left always overreaches, as evil always does. People have perfectly good BS detectors. The problem is they see ALL politicians as corrupt hacks and apply a certain moral equivalency. The logical fallacy of the truth falling somewhere in the middle.
Trouble is I'm not sure they're wrong about the repubicans.