This is one of those "damned if you do, damned if you don't" situations. On the one hand, if you get rid of Holy Joe, it'll come back to haunt you in 2012. I can see the headlines now: "DEMONCRATS HATE JEWS AND ARE SECRETLY PLANNING A NEW HOLOCAUST!!!" On the other hand, if you keep Two-Faced Joe, it shows that you aren't really any better than the GOP about ousting corrupted politicians.
Of course it isn't "dignified". McCain hasn't been the McCain of yesteryear ever since he got screwed over by the Bush Machine way back in 2000. After he started pandering the the extreme right of the GOP, I lost all hope. McBush is only kidding himself with this "Maverick" bullshit, these days.