Access to this article requires a subscription to The Atlantic, but it's well worth it (the ACC library probably has a copy).
It's called "Present at the Creation" and is written by a pretty ticked off Matthew Scully, who was a speech writer for both Governor and President Bush until just before his re-election. It's primary purpose is to challenge the claims of one of his fellow speech writers, Michael Gerson, who he says has falsely claimed to have single handedly written most of the Bush's most famous speeches and to have come up with some of the most noteworthy phrases in those speeches (like "axis of evil").
Gerson has since parlayed his position in the Bush administration into a lucrative career as an op-ed writer for the Washington Post. Scully is pretty brutal. He accuses Gerson of deliberate dishonesty. But aside from taking licks at Gerson, Scully also provides a great overview of the process they used to create Bush's speeches. It's a great inside look at how political rhetoric is shaped.