George McGovern in New Hampshire, 1972. © Constantine Manos/Magnum Photos

When President Franklin Roosevelt came into office in the depth of the Great Depression, he sought to stabilize and empower American society by introducing bold new initiatives: Social Security, the Public Works Administration, the Federal Deposit Insurance Corporation, the Rural Electrification Administration, the Tennessee Valley Authority, the Civilian Conservation Corps, and the Agricultural Adjustment Administration, among many others. These measures were sufficiently successful, as was his leadership during World War II, that he secured four terms in the White House. There was some congressional resistance…