On what might become one of the most significant days in her husband's presidency, Alice Blackwell considers the strange and unlikely path that has led her to the White House--and the repercussions of a life lived, as she puts it, “almost in opposition to itself.”A kind, bookish only child born in the 1940s, Alice learned the virtues of politeness early on from her stolid parents and small Wisconsin hometown. But a tragic accident when she was seventeen shattered her identity and made her understand the fragility of life and the tenuousness of luck. So more than a decade later, when she met boisterous, charismatic Charlie Blackwell, she hardly gave him a second look: She was serious and thoughtful, and he would rather crack a joke than offer a real insight; he was the wealthy son of a bastion family of the Republican party, and she was a school librarian and registered Democrat. Comfortable in her quiet and unassuming life, she felt inured to his charms. And then, much…