Simfan, take a look at my "MEGA election 2012 turnout chart":
https://uselectionatlas.org/FORUM/index.php?topic=181934.0Or if you prefer, Prof. McDonald's blog of turnout data (he uses 2011 data for his calculations, whereas I already used the 2012 data from the Census Bureau):
http://elections.gmu.edu/Turnout_2012G.html...
AR only had 48% turnout in 2012, relative to it's adult population (VAP).
KY had 53%, LA 57% and NC had 60% turnout.
Which means that if you have a sample of 1000 adults, where about half has not voted and 60% of those who voted, then you only get some 30% overall for Romney.
Of course, Obama's percentage is higher than it should be. Why is that ?
Maybe because Southern people are simply liers in these polls: Remember the polls in AR that showed Obama down by only 10-15 points ahead of the election ? Then, in the secrecy of the voting booth, those Southerners are returning to their redneck-voting-behaviour and voted for Romney by over 20 points ...
Or people simply don't remember and give false answers, or don't care. And these subsamples usually have high MoE too.
SurveyUSA often has very strange crosstabs too, but the overall topline is often very accurate.