Chicagoboyz elder JLG makes a point about Rudy Giuliani that I haven’t heard elsewhere.
Giuliani is widely respected, and one reads suggestions that Bush should appoint him head of Homeland Security, Defense or (until Bush selected someone else) the CIA. The problem with doing this would be similar to one of the problems associated with having Colin Powell as Secretary of State: Giuliani is a major political figure in his own right, with a significant constituency, and would be difficult to fire. He might perform well in his appointed role, but if he decided to pursue his own agenda Bush might be able to prevent him from doing so only at high political cost. That’s not a good deal for Bush, or for the voters, who have a right to expect the president’s appointees to implement his policies faithfully.