Dollar Bill Jefferson was defeated by a hurricane. The Veteran Congressman was defeated in a a general election delayed by hurricane Gustav. It just goes to show that even a wily corrupt politician can't mess with mother nature.
Jefferson had what seemed to be a foolproof strategy, let all of the viable African-American candidates defeat each other in the primary and ride Obama's coat tails to re-election. Gustav caused the election to be postponed making Dollar Bill the only guy on the ballot. Jefferson fatigue and motivated opposition unseated him.
Joseph Cao is an impressive guy and I wish him well, but he ought not plan on staying in Congress more than two years, unless he can pull a very large rabbit out of his hat.