Are black people supporting Obama mainly because he's black? If race is just one factor in blacks' support of Obama, does that make them racist? Can blacks' support for Obama be compared with white voters who may favor his Republican challenger, Mitt Romney, because he's white?
These questions have long animated conservatives who are frustrated by claims that white people who oppose Obama's policies are racist. This week, when a black actress who tweeted an endorsement of Romney was subjected to a stream of abuse from other African-Americans, the politics of racial accusation came full circle once again.
Stacey Dash, who also has Mexican heritage, is best known for the 1995 film "Clueless" and the recent cable-TV drama "Single Ladies." On Twitter, she was called "jigaboo," "traitor," "house nigger" and worse after posting, "Vote for Romney. The only choice for your future."
The theme of the insults: A black woman would have to be stupid, subservient or both to choose a white Republican over the first black president.