Career
He became active in politics in 1934. In 1943, he was elected as a school trustee for Toronto"s Ward 8. However, McMillin died in August before the new Parliament was able to meet.
McMillin died suddenly of a heart attack early on August 20, 1949 only 59 days into his term.
An October by-election to fill the vacancy created by McMillin"s death returned Progressive Conservative James MacKerras Macdonnell to Parliament.