Is Millard Fillmore, the 13th President of the United States, the least significant of all the commanders in chief? Or the most underestimated? Jared Cohen, author of Accidental Presidents: Eight Men Who Changed America, has the answer.<p> </p><p>Learn more about your ad choices. Visit <a href="https://megaphone.fm/adchoices">megaphone.fm/adchoices</a></p>

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