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Michael D'Antonio, the author of "The Truth About Trump," is writing Trump Watch, a series of columns on President-elect Donald Trump for CNN Opinion. The opinions expressed in this commentary are his.
(CNN)At the first stop on a victory tour that evoked his chaotic campaign, President-elect Donald Trump said, "We are going to appoint Mad Dog Mattis as our secretary of defense." The studious retired Marine Gen. James Mattis has other nicknames, including "Warrior Monk." But Trump learned much of what he knows about leadership at military school, and "Mad Dog" sounded just right to a man who was taught that life is all about determining where you fit into the pack.