Looking at the 2012 Trendline Map (Relative to State's Historical Partisanship), I notice that many of the states that have trended most Democratic and Republican tended to be won by Clinton in the 2008 primary, and those that have trended the least tended to have been won by Obama in the 2008 primary.
I took the top 27 states of the list on "States with the clearest 2012 trend relative to states’ average voting between 1964-2012" and colored them Red, and colored the rest of the states Green, to match the Atlas' 2008 primary colors:
Clinton Obama Primary Map:
