In late spring of 2005, George Galloway, a newly elected member of British Parliament, came to Washington, D.C., to appear before a Senate subcommittee that claimed--without ever talking to him--that he had enriched himself through the scandal-plagued Iraq oil-for-food program. What happened next was a rare political moment: to the surprise of the assembled senators, congressional aides, and press, Galloway turned the tables on his accusers, calling...