Do you want me to be a slave again?
What is this "Again?" She'd have to be at least 143 years old to have lived as a slave. She's old, but not that old.
Come to think of it, how could anyone answer that question? It is an example of the "Have you stopped beating your wife?" genre of unanswerable questions.
The sort of funny answer you always think of after the fact might be: "I never wanted anybody to be a slave, but if you insist I could make an exception in your case." [rimshot] Actually, that sounds like a possible McCain line.
Wouldn't it be refreshing to have a president with a snide sense of humor? Obama exhibits the ponderous humorlessness of the cross-cultural person.