Doesn't look like Wolfe won a district. I don't know the relative votes of the counties, but the fact the counties appear to be fairly evenly mixed throughout the state, combined with Obama's reasonably high percentage margin statewide, makes it unlikely. I think AR-04 was probably closest.
Oooooh, he did...
I've found a site that provides the data for congressional districts:
1st CD: 50.68% for Wolfe
2nd CD: 77.09% for Obama
3rd CD: 78.50% for Obama
4th CD: 50.58% for Obama
It seems like AR-01 was the only congressional district nation-wide that he didn't win during the primary season.
Wow, that's a lot more heterogeneous than I thought.