Bush is trying to find a general willing to oversee both wars. Generals so far have not been ready to hop right into Bush's mess. Three have declined to take the job.
Actually, any intelligent general will shun this unless Bush has (or wants) a plan to withdraw from Iraq. Iraq is eating the military alive. It has run the Army, the Reserves and the National Guard into rags; and it has had a notably deleterious effect upon the USMC as well.
Who would be deluded enough to take this job?