Ending months of suspense and breaking with political custom, U.S. Sen. Mary Landrieu, the de facto leader of the state's Democratic Party, announced Monday that she has joined her Republican colleague, U.S. Sen. David Vitter, in supporting the retention of Jim Letten as U.S. attorney for Louisiana's Eastern District.She also named Orleans Parish Civil District Court Judge Michael Bagneris as her choice to fill a federal judgeship and Genevieve "Genny" May for U.S. Marshal. With both Louisiana senators now in agreement, Letten, the GOP's choice for the job eight years ago, appears to be a lock to win Senate approval...