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Trivia answer

Since 1968, nine states have voted for the Republican presidential candidate in every election. Which of the following states is not among them?
a. Idaho
b. Montana
c. Wyoming
d. South Dakota

Since 1968, nine states (Alaska, Idaho, Kansas, Nebraska, North Dakota, Oklahoma, South Dakota, Utah, and Wyoming) have been carried by the Republican presidential candidate in every election. Montana, which backed Bill Clinton (D) in 1992, is not among them.

The nine states are tied for the longest currently-running winning streak in presidential elections with 13 consecutive Republican wins. The state with the longest streak of backing Democratic candidates is Minnesota, which has backed every Democratic nominee since 1976 for 11 consecutive wins. Washington, D.C., the only non-state to vote in presidential elections, has voted for the Democratic nominee in every election since 1964, when it first cast a presidential vote.

A winning streak is defined as when a single party wins two or more consecutive elections. This means that the six states which backed Barack Obama (D) in 2012 and Donald Trump (R) in 2016 (Florida, Iowa, Michigan, Ohio, Pennsylvania, and Wisconsin) do not currently have a presidential winning streak. Of the 44 states with streaks, 24 have Republican winning streaks and 20 have Democratic winning streaks. The average Republican winning streak lasts through the past nine elections, while the average Democratic winning streak lasts through the past seven.