David Graham finds PPP's line of questioning in Mississippi and Alabama problematic. Michelle Cottle considers the poll "cultural profiling": 

[I]nterracial marriage—since when is this a relevant topic in American politics? Similarly, why do we need to know respondents’ views on evolution? Last time I checked, not even Santorum was waving the creationism (or intelligent design) banner in this race. Which could explain why, when I went back and looked through the rest of PPP’s polls from this year, I couldn’t find any other states that were asked about evolution. Ditto questions about whether Obama is a Muslim. And in only one other state did I see voters being asked about interracial marriage: South Carolina.