States most similar

[jimrtex]

Based on their voting record for President, the following states have been together for 10 elections or more

Since 1844 (38 times)    In 1840, Mississippi went for Harrison, Alabama for Van Buren.  Neither voted in 1864, and Mississippi didn't vote in 1868.  Alabama for Byrd in 1960 based on electoral vote majority.

1900 (26)   In 1896, North Dakota (McKinley) and Kansas (Bryan).

1912 (23)   In 1908, KS and ND (Taft) and Nebraska (Bryan)

1916 (22)  In 1912, Idaho (Wilson) and Utah (Taft)

1916 (22)  In 1912, Indiana (Wilson) and South Dakota (Roosevelt)

1920 (21)  In 1916, KS, NE, and ND (Wilson) and IN and SD (Hughes)

1920 (21)  In 1916, New Mexico (Wilson) and Illinois (Hughes)

1924 (20)  In 1920, Oklahoma (Harding) and Virginia (Cox)

1928 (19)  In 1924, ID and UT (Coolidge) and OK and VA (Davis)

1944 (15)  In 1940, Connecticut (Roosevelt) and Michigan (Wilkie)

1948 (14)  In 1944, ID, OK, VA, and UT (Roosevelt) and Wyoming (Dewey)

1948 (14)  In 1944, Montana (Roosevelt) and Colorado (Dewey)

1948 (14)  In 1944, Tennessee (Roosevelt) and Ohio (Dewey)

1952 (13)  In 1948, ID, OK, VA, UT, WY (Truman) and IN, KS, NE, ND, SD (Dewey)

1952 (13)  In 1948, IL and NM (Truman) and New Jersey (Dewey)

1952 (13)  In 1948, California (Truman) and Vermont (Dewey)

1952 (13)  In 1948, Iowa (Truman) and Oregon (Dewey)

1956 (12)  In 1952, TN and OH (Eisenhower) and Kentucky (Stevenson)

1960 (11)  Alaska (first election) and ID, IN, KS, NE, ND, OK, SD, VA, UT, WY

1960 (11)  Hawaii (first election) and Rhode Island

1964 (10)  In 1960, NM, NJ, and IL (Kennedy) and CA and VT (Nixon)

1964 (10)  In 1960, Missouri (Kennedy) & KY, OH, and TN (Nixon)

1964 (10)  In 1960, CT and MI (Kennedy) and Maine (Nixon)

1964 (10)  In 1960, Nevada (Kennedy) and New Hampshire (Nixon)

The Longest Streak for States with Fewer than 10 Elections Together (state name spelled out if longest streak)

1968 (9)  In 1964, North Carolina (Johnson) and South Carolina (Goldwater)

1968 (9)  In 1964, Arkansas (Johnson) and Louisiana (Goldwater)

1972 (  In 1968, NC, SC (Nixon) and Texas (Humphrey) and AL, MS (Wallace)

1972 (  In 1968, Delaware (Nixon) and Pennsylvania (Humphrey)

1972 (  In 1968, Wisconsin (Nixon) and New York (Humphrey)

1972 (  In 1968, IA, OR (Nixon) and Washington (Humphrey)

1976 (7)  In 1972, Minnesota (Nixon) and District of Columbia (McGovern)

1976 (7)  In 1972, NY, WI (Nixon) and Massachusetts (McGovern)

1980 (6)  In 1976, Florida (Carter) and Arizona (Ford)

1984 (5)  In 1980. CO, MT (Reagan) and Georgia (Carter)

1984 (5)  In 1980. CA, CT, DE, IL, ME, MI, NJ, NM, PA, VT (Reagan) and Maryland (Carter)

1992 (3)  In 1988 AR, LA (Bush) and West Virginia (Dukakis)

Split Apart In 2000

Been Together Since 1912  (22) Nevada and New Mexico (since New Mexico statehood)

1920 (20)  Nevada and Illinois
1948 (13)  New Hampshire and Vermont
1952 (12)  Nevada and New Jersey
1952 (12)  New Hampshire and California
1956 (11)  West Virginia and Rhode Island
1960 (10)  West Virginia and Hawaii (since Hawaii statehood)
1960 (10)  Missouri and Delaware (had both picked
winner since 1960)

[jimrtex]

Based on their voting record for President, the following states have been together for 10 elections or more

Split Apart In 2000

1948 (13)  New Hampshire and Vermont

That one really suprised me.

They have crossed over.  Traditionally, Vermont has been the most Republican State, while New Hampshire had some mills and ports that provided some Democrat support.   The major population concentrations are in opposite corners, Burlington on Lake Champlain, and Manchester and Nashua as part of the outward growth of Boston, while the area along their Connecticut River border is lightly populated.

The three elections from 1936-44 they were split, with NH voting for FDR while Vermont was one of the very few to vote GOP.

A curiousity is that Vermont and California have now been together since 1952, while they are 1st and 49th in population.

Also kind of interesting is that Nevada and Illinois were together from 1920-1996.  When the association began Nevada had 77,000 people, Illinois 6.5 million, with Chicago the second largest city in the country.   Gambling flourished in both places.