Particularly noteworthy is Digby's explanation of why this is a problem:
I know that when people long for more "bipartisanship" they envision two parties coming together to the benefit of the people they serve. Instead what ends up happening is "bipartisanship" being a political code word for both sides teaming up to conspire against the American public. I would also add that another problem is the vast shift and reclassification of where the political "middle" is. Let me get all metaphorical on your assess and put it this way: I'm not a big follower of the sportsball or anything but I'm pretty sure that if that one game (the one with the pigskin big steroidy players) moved the goal of one of the endzones to the 40 yard line it would be more that a little disingenuous to claim the 50 yard line as the middle of they, wouldn't you say?