The chart below, from JP Morgan’s Michael Cembalest, is making the rounds (a more complete explanation is here), and if there’s one chart that better explains the continued divisiveness of Obamacare in American life, I’ve yet to see it. Simply put, Obamacare was the most partisan piece of social legislation passed in the last 100 years. …

Of course, as with all claims of divisiveness, it takes both sides to divide (after all, one side can always surrender), but we have reached a point where every single Republican is required by their constituents to demonstrate opposition to Obamacare, while the vast majority of Democrats are required by their constituents to demonstrate support. Given the importance of health care to each American, I can think of few better formulas for continued national division.