And only 47% of Southerners... making it the only region of the U.S. with a number below 85%.
Was this poll manipulated to make Southerners look dumb?
Actually I'd say the "Southerners" statistics is the more relevant one. If the effect were merely:
Republicans->Birthers
The rate of birthers would be higher in the Midwest, where Republicans are outnumbered but are not endangered-species territory, and in the "West", which includes the Mountain West as well as the Pacific Coast. Instead, the effect seems to be more along the lines of:
Southerners->Republicans
Southerners->Birthers
(or, perhaps, Southerners+Republicans->Birthers)