The Democratic Party candidate , incumbent President Lyndon B. Johnson , who had assumed the presidency less than a year earlier following the assassination of John F. Kennedy , won the state over U.S. Senator Barry Goldwater of Arizona by a margin of 431,493 votes , or 27.76 percent . Johnson went on to win the election nationally , by a landslide margin of 22.58 percent of the popular vote . Goldwater carried only six states , including his home state of Arizona , together with the five southern states of Alabama , Georgia , Louisiana , Mississippi , and South Carolina
assassination
Assassination of John F. Kennedy
1964 United States presidential election in Minnesota