Sudan, by expelling foreign aid agencies, has created the conditions for "untold misery and suffering" among hundreds of thousands of victims of the six-year-old war in the Darfur region, Secretary of State Hillary Rodham Clinton said Tuesday. Also Tuesday, in a signal of the Obama administration's intention to step up U.S. involvement in the violence-wracked region, President Barack Obama settled on retired Air Force Gen. J. Scott Gration, a close personal friend with long experience on African issues, to be special envoy to Sudan, a senior administration official told The Associated Press.