Philip Kopper: ‘Unexpected President’ book review

UNEXPECTED PRESIDENT: THE LIFE AND TIMES OF CHESTER A. ARTHUR By Scott S. Greenberger DaCapo, $28, 304 pages Just when we thought there is something new under the sun, consider this: A New York plutocrat, who won fame for greed, wheeler-dealing and extravagance without ever holding elective office, becomes president of the United States. Now reconsider:…