In a national landslide for incumbent President Lyndon B. Johnson, Arizona was one of only six states carried by Arizona native and U.S Senator Barry Goldwater, and the only state that Goldwater won outside of the Deep South. Johnson successfully carried many Republican strongholds such as Alaska, Idaho, Indiana, Kansas, Nebraska, Oklahoma, North and South Dakota, Utah and Wyoming; however, he lost Arizona by less than 5,000 votes (Or 0.99%), the smallest margin of any state in the election. Key to Goldwater’s victory in the state was Maricopa County, the state’s most populated county, which he won by over 21,000 votes.
This election marked Arizona's turn from being a bellwether state in elections (Usually favoring Democrats) into a firm stronghold of the Republican Party. From 1952 to 1992, Arizona would vote for the Republican candidate in every presidential election (Mostly by large margins, unlike Goldwater's close victory), and it was the only state during those forty years not to vote for a Democrat at least once. Bill Clinton would carry the state by a small margin in 1996, but his victory has proven to be an exception, as the state has continued supporting Republicans since.