votes) Margin of victory between 5% and 10% (83 electoral votes): Wyoming, 5.93% (6,654 votes) New Hampshire, 6.44% (15,165 votes) Massachusetts, 6.75% (136,822 votes) Pennsylvania, 6.89% (281,187 votes) (tipping point state) Connecticut, 7.14% (55,802 votes) Oregon, 8.07% (38,860 votes) Idaho, 9.05% (21,289 votes) Delaware, 9.65% (13,159 votes) Vermont, 9.86% (14,102 votes) Statistics Counties with Highest Percent of Vote (Democratic) Terrell County, Georgia 100.00% Tate County, Mississippi 99.81% Lancaster County, South Carolina 99.57% Calhoun County, South Carolina 99.55% Chesterfield County, South Carolina 99.31% Counties with Highest Percent of Vote (Republican) McIntosh County, North Dakota 91.66% Jackson County, Kentucky 88.62% Gillespie County, Texas 86.74% Mercer County, North Dakota 85.36% Johnson County, Tennessee 84.21% Foreign interference The British government engaged covert intelligence operations to support Roosevelt, including the planting of false news stories, wiretaps, "October surprises", and other intelligence activities. See also 1940 United States House of Representatives elections 1940 United States Senate elections History of the United States (1918–1945) Third inauguration of Franklin D. Roosevelt The Plot Against America, a 2004 alternative history by Philip Roth, premised on the 1940 defeat of Roosevelt by Charles Lindbergh Bring the Jubilee, a 1953 alternative history novel by Ward Moore, set in a universe where the Confederacy won the American Civil War, where the election is contested by Whig candidate Thomas E. Dewey and Populist candidate Jennings Lewis. References Further reading Barnard, Ellsworth . Wendell Willkie: Fighter for Freedom (1966) Bowen, Michael D. The Roots of Modern Conservatism: Dewey, Taft, and the Battle for the Soul of the Republican Party (U of North Carolina Press, 2011). Burns, James MacGregor. Roosevelt: The Lion and the Fox (1956) Cole, Wayne S. America First: The Battle against Intervention, 1940–41 (1953) Cole, Wayne S. Charles A. Lindbergh and the Battle against American Intervention in World War II (1974) Davies, Gareth, and Julian E. Zelizer, eds. America at the Ballot Box: Elections and Political History (2015) pp. 153–66. DeSilvio, David. How Domestic Politics Influenced Foreign Policy in the 1940 Election: FDR, Domestic Politics, Foreign Policy, and the Election of 1940 (2008) Divine, Robert A. Foreign policy and U.S. presidential elections, 1940-1948 (1974) online; pp 3–90 on 1940 Doenecke, Justus D. Storm on the Horizon: The Challenge to American Intervention, 1939–1941 (2000). Doenecke, Justus D. The Battle Against Intervention, 1939–1941 (1997), includes short narrative and primary documents. Donahoe, Bernard F. Private Plans and Public Dangers: The Story of FDR's Third Nomination