Who was the only presidential candidate to die during the electoral process?
Greeley was the new Liberal Republican Party’s candidate in the 1872 U.S. presidential election. He lost in a landslide, despite having the additional support of the Democratic Party. He was devastated by the death of his wife, who died five days before the election, and died himself three weeks later.
Greeley ran as a Liberal Republican against President Ulysses S. Grant in 1872. He lost in a landslide, only winning 66 electoral votes to Grant’s 286. However, Greeley died after election day but before the electoral votes could be officially cast. They were instead spread among four minor candidates. Source: Encyclopaedia Brittanica
Horace Greeley (February 3, 1811 – November 29, 1872) was founder and editor of the New-York Tribune, among the great newspapers of its time. Long active in politics, he served briefly as a congressman from New York, and was the unsuccessful candidate of the new Liberal Republican party in the 1872 presidential election against incumbent President Ulysses S. Grant.