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A presidential election was held in Chile on 4 September 1970. A very narrow plurality was secured by Salvador Allende, the candidate of the Popular Unity coalition of leftist parties. Because he did not obtain an absolute majority, his election required (and received) a further vote by the National Congress of Chile which resulted in Allende assuming the presidency in accordance with the Chilean Constitution of 1925.
| Candidate | Party/Coalition | Votes | % |
|---|---|---|---|
| Salvador Allende Gossens | Popular Unity (UP) | 1,066,372 | 36.29% |
| Jorge Alessandri Rodríguez | Independent conservative | 1,050,863 | 35.76% |
| Radomiro Tomic | Christian Democratic Party (CD) | 821,350 | 27.95% |
| Total valid votes | 2,943,561 | Source: |
Other sources give slightly different figures. See, for example:
The 1989.
According to the constitution, Congress had to decide between the two candidates who had received the most votes. The precedent set on the three previous occasions this situation had arisen since 1932 was for Congress simply to choose the candidate with the highest number of votes; indeed, former president Alessandri had been elected in 1958 with 31.6% of the popular vote.
In this case, however, there was an active campaign against Allende's confirmation by Congress, and his presidency was ratified only after he signed a "Statute of Constitutional Guarantees".
There are generally two views of the voting in 1970. Those who opposed Salvador Allende point out that he received only a plurality of 36.3% of the vote. Those who supported him point instead to the fact that leftist forces clearly won a majority: in addition to Allende and the Unidad Popular (UP or Popular Unity) coalition he represented, Christian Democrat Radomiro Tomic won 27.9% with a very similar platform to Allende's. Conservative former president Jorge Alessandri received slightly under 35.8% of the vote.
It has been argued than given that less than the majority of the voters voted for him, Allende did not have a clear "mandate" to embark in the wide reforms put forward on his program. But the legality of the election itself is not in dispute.