Is this going to be on the test?
Andy and Yuval both explain well that the Bush Doctrine is a multi-faceted policy, not clearly defined, and only intermittently adhered to in any of its particulars. David Gergen — of all people — on CNN pointed out that the phrase is, for the most part, inside DC/foreign policy establishment jargon. It is not used widely in the media, even in more serious discussions of whichever aspect is under scrutiny.
(To be fair, nobody read the New York Sun)