Eugene Edward Siler Sr. was an American politician and member of the United States House of Representatives from Kentucky between 1955 and 1965. He was the only member of the House of Representatives to oppose the Gulf of Tonkin Resolution. That resolution authorized deeper involvement of the United States in the Vietnam War.

The Gulf of Tonkin Resolution or the Southeast Asia Resolution, Pub. L.Tooltip Public Law  88–408, 78 Stat. 384, enacted August 10, 1964, was a joint resolution that the United States Congress passed on August 7, 1964, in response to the Gulf of Tonkin incident.