There is a book coming out supposedly based on interviews with Secret Service agents that reveals the "behind closed doors" character of the people being guarded.

Disturbing: those being protected, such as presidents, need to be able to trust that they never will be talked about by the Secret Service. Otherwise the trust is lost, and the temptation to ditch the protection increases. I would, however, make an exception to the secrecy for felonies.

Interesting: if the material is to be believed: Nixon and LBJ may have been even weirder than I knew, and I already thought they were odd; Carter was not likable; and the Obamas are OK so far, though Barak is lying about not smoking.