What Is the "Bush Doctrine"?

Today's Washington Post has a front-page story headlined "Many Versions of 'Bush Doctrine.'" Over on the op-ed page, Charles Krauthammer -- apparently the first pundit to coin the phrase, and a critic of Palin's nomination -- suggests there are at least four "Bush Doctrines," and the one Charles Gibson elucidated is the wrong one. For what it's worth, I don't know whether I would have identified the "right" definition of the "Bush Doctrine" if asked the same question, and I haven't seen the full interview yet, so I don't have an opinion of Palin's performance on this, or other, questions.