This covers the President and VP, but I’m sure it covers anyone who travels with the president. Leavitt doesn’t feel slighted.
Key Security Protocols
Air Travel: The president and vice president fly on separate aircraft. The vice president does not board Air Force One as a passenger with the president. [1, 2]
Car Travel: They do not ride in the same motorcade vehicles when moving between locations. [1, 2]
High-Threat Situations: During times of heightened national security or crisis (such as the September 11 attacks), protocols dictate they be kept in separate, secure locations. [1, 2]
The State of the Union: While the president and vice president both attend, a designated cabinet member (the "designated survivor") is kept at a secret, secure off-site location to maintain the U.S. presidential line of succession if a catastrophic event occurs