Source for Popular Vote data: North Dakota Secretary of State. Official Abstract of Votes Cast at the General Election Held November 6, 1956, North Dakota Secretary of State (https://vip.sos.nd.gov/pdfs/Abstracts%20by%20Year/1950s'%20Election%20Results/1956/General%20Election%2011-06-1956.pdf) (accessed 19 Nov 2013)