A presidential election was held in Chile on September 4, 1964. Christian Democratic candidate Eduardo Frei Montalva won the election by an absolute majority.
The Church Committee of the U.S Senate in 1975 revealed that the Central Intelligence Agency (CIA) interfered substantially with the election to prevent the accession of Marxist Salvador Allende. The CIA secretly funded more than half of Frei's campaign and supported an array of pro-Christian Democratic groups. Two other political parties were funded as well in an attempt to spread the vote. The CIA's assistance to Frei took the form of polling, voter registration and get out the vote drives, in addition to covert propaganda.