Is the White House Looking for an Exit Strategy in Iraq?

Defense Secretary Robert Gates has cancelled a trip to South America amid reports that he's part of an "agonizing reappraisal" of Iraq strategy at the Bush White House, set off in part by the defections of high-ranking Republican Senators. Press Secretary Tony Snow, who was grilled by reporters today, stressed that the President wanted to respond to the situation on the ground rather than to politics. Howard LaFranchi is diplomatic correspondent for the Christian Science Monitor.