Blair and Bush are to hold urgent talks this week about the conduct of the war and the re-structuring of Iraq.
Blair will arrive Wednesday and the two leaders will go to Bush's presidential retreat at Camp David to continue their talks Thursday, the Associated Press reported, citing a diplomatic source.
On Monday Blair told the British parliament that Allied forces were 60 miles south of Baghdad but could soon encounter the Medina division of Saddam Hussein's Republican Guard, which could be a critical moment.
Blair said the war objectives would bring humanitarian help for Iraq's "brutalized" people and a peaceful future, but warned: "There will be anxious moments in the days ahead but coalition victory is certain."