The only two pairs of states that have voted together in every election:
Indiana and Alaska
Rhode Island and Hawaii
What about Alaska and the following states (not counting elections before 1960 when Alaska was not yet a state)?
Idaho
Utah
Wyoming
North Dakota
South Dakota
Nebraska
Kansas
Oklahoma
Indiana (already mentioned)
Virginia (oh well someone beat me to that one)
The above ten states all went for Eisenhower in 1956 and 1952. Idaho, Utah, Wyoming, Oklahoma, and Virginia went for Truman in 1948, while the four states north of Oklahoma and Indiana went for Dewey. Wyoming is separated from the Truman half of the "Alaska-like Ten" when you go back to 1944 (it went for Dewey, while the other four went for FDR), while the Dewey '48 half went for Dewey in 1944 as well. All ten states, except for Wyoming which has already voted differently from each other state when you go back from 2000 through 1944, went for the same party's candidate in 1940 as in 1944. All of the Alaska-like Ten went for FDR in 1936 and 1932 and for Hoover in 1928. Eight of the ten states went for Coolidge in 1928, but Oklahoma and Virginia went for Democrat John Davis which separates them from Idaho and Utah. Virginia went Democratic in 1920, but the other nine states in the Alaska-like Ten, including Oklahoma (which has went for the same candidate as Virginia ever since), went for Harding. South Dakota and Indiana went Republican in 1916, but the rest of the ten states went for President Wilson. South Dakota and Indiana are now separated from North Dakota, Nebraska, and Kansas, and the only other instance of multiple states in the Alaska-like Ten going (at least in terms of the popular vote) for the same candidate in every election from 1916 on in Idaho and Utah. Every state in the Alaska-like Ten went for Wilson in 1912 except for Utah which went for Taft (breaking up the Idaho-Utah pair) and South Dakota which went for TR (breaking up the South Dakota-Indiana pair). So only the North Dakota-Nebraska-Kansas trio remains. Nebraska sets itself apart from Kansas and North Dakota in going for Bryan instead of Taft in 1908, and Kansas and North Dakota both got separate ways in 1896 when Kansas goes for McKinley and North Dakota for Bryan (both states went for McKinley in 1900 and for TR in 1904).
Sincerely,
Kevin Lamoreau
