STUDY SUGGESTS southern slavery turns white people into Republicans 150 years later.

President Obama polled significantly worse with white voters in the South than he did with whites in swing states.... [A] new study by political scientists Avidit Acharya, Matthew Blackwell and Maya Sen suggests that ... the legacy of slavery continues to drive voters in areas that once housed large numbers of slaves to vote Republican.

It doesn't seem to occur to the Left that they're called 'swing states' for a reason....