Did anyone else catch John Kerry’s chat-show line on McCain yesterday? It seemed like the Obama campaign is testing out a new line on him:

George, you have a choice, where John McCain has proven that he’s not a maverick, he’s erratic.

This line is devastating. The best framing presents a comprehensive narrative for both familiar facts and new information. And this is just such a frame: culminating in the Palin pick, McCain has begun unsteady, unpredictable, unserious. It recognizes that what were once his political strengths are now weakness. Particularly as McCain pivots off the "experience" line, he’ll have no counterattack for this.