Paul Broun, the Democrats' favorite Republican, is the Republicans' favorite, too
Obama got 43.6% of the vote in 2012, 43.9% in 2008. In Jack Kingston's district Obama got 43% in 2012, 44.4% in 2008.
In Broun's Obama got 36.3% in 2012, 38.8% in 2008.
link.
Looking at other districts in other states, Mike McIntyre's in NC went 39.9% Obama in 2012 and he retired because he didn't think he could win it again. Nick Rahall's in WV went 42.3% Obama in 2008 but only 32.8% Obama in 2012, and he's in the fight of his life this year. Jim Matheson's went 40.9% Obama in 2008 but only 30.2% Obama in 2012, and he retired.
Looking at the context, it looks like it's in the range where Democrats just don't win those districts anymore. I think we could beat Broun statewide, but if we can't, we certainly couldn't beat him in a district that looks almost 10 points more Republican than the state of Georgia.
http://www.dailykos.com/story/2014/03/10/1283563/-Paul-Broun-the-Democrats-favorite-Republican-is-the-Republicans-favorite-too