Why is this a surprise?

Nate Cohn discusses the results of a new Pew survey of president Obama’s support and where it is dropping.

Today’s Pew Research poll paints a clear picture of the Obama defectors. They’re almost exclusively white voters without a college degree. Obama’s standing among minorities, college educated whites, and affluent whites has actually improved since the final Pew Research poll before last November’s presidential election. Instead, Obama’s support among white working-class voters has taken a huge hit, opening an unprecedented 41 point education gap among white voters. Incredibly, the poll now even shows Obama with a stronger approval rating among affluent whites than downscale whites—something that’s never happened for a Democrat in a presidential election.

I am not sure why Cohn is surprised that affluent white voters support Obama more than ‘downscale’ whites, since he has shown himself to be so friendly in his policies towards the former. I suspect that it is only because the Republicans have been so awful towards minorities that Obama has retained their support.