Why 2012 isn’t 2008 — in 1 chart

There’s been lots (and lots) written about how and why the 2008 election and the 2012 contest are so different.

But, we’ve never seen the case made so clearly as in a new chart put together by Simon Jackman, a professor of political science at Stanford University.

What Jackman aimed to do is compare how Obama performed in each state in 2008 against where polling suggests he is in that same state today — based on his 2012 polling average in each state. [cont.]

Chris Cillizza, Washington Post