Nan Britton, a young single mother, smiled softly as she went to bed on the evening of August 2, 1923. Her married lover and the father of her child would soon be returning from a business trip. She'd see him soon. With his generous support, she was living comfortably in New York. Her life, though, was about to change dramatically. Some 3,000 miles away, at the Palace Hotel in San Francisco, her lover, the President of the United...