Grantings has some good comments on Giuliani’s rhetoric. He uses Churchill’s "Scaffolding of Rhetoric" to explain why Rudy gave a great speech. An example from Giuliani: "Frankly, I believed then and I believe now that Saddam Hussein, who supported global terrorism, slaughtered thousands and thousands of his own people, permitted horrific acts of atrocities against women, and used weapons of mass destruction, was himself a weapon of mass destruction."
Churchill: "An apt analogy... appeals to the everyday knowledge of the hearer and invites him to decide the problems that have baffled his powers of reason by the standard of the nursery and the heart.... Whether they translate an established truth into simple language or whether they adventurously aspire to reveal the unknown, they are among the most formidable weapons of the rhetorician."