A former ABC News consultant fired last year because he couldn't authenticate academic credentials is at the center of a new dispute over apparently faked interviews with Barack Obama, Nancy Pelosi, Bill Gates and others. ADVERTISEMENT The consultant, Alexis Debat, quit the Nixon Center, a Washington think tank, on Wednesday after Obama's representatives claimed an interview with the senator appearing under Debat's byline in the French magazine Politique Internationale never took place. The interview quoted the Democratic presidential candidate as saying the Iraq war was "a defeat for America." Pelosi, Gates, former Federal Reserve Chairman Alan Greenspan, former United Nations...