I would pretend to be a Repub and then ask some question to the Prez that couldn't be spun or avoided:
"Do you believe in erring on the side of life for death row inmates, Iraqi civilians, or Alaskan caribou?"
"Why do you claim that the current Social Security plan treats blacks unfairly, when African Americans that live past 50 live longer than the average caucasian?"
"Has your marriage been affected by the ones taking place in San Francisco and Massachusetts?"