Sean O'Sullivan (priest)

Sean Patrick Paul O'Sullivan, CM (January 1, 1952 – March 9, 1989) was a Canadian politician who left politics and became a Roman Catholic priest.

Born in 1952 in Hamilton, Ontario, O'Sullivan showed an interest in politics at a young age: when he was 11 years old he worked for Ellen Fairclough in her election campaign and met John Diefenbaker for the first time. He was educated at Bishop Ryan Catholic Secondary School and Brock University in St. Catharines. When he was just 15 years old he was named Western Ontario representative of the Youth for Diefenbaker movement. This movement was formed in Ottawa to engage support of Canada's young conservatives for John Diefenbaker at the leadership convention. In 1970, at age 18, he was chosen as president of the Young Progressive Conservatives of Canada.

In 1971, Diefenbaker appointed O'Sullivan as his executive assistant, and in the 1972 election, the 20-year-old O'Sullivan was elected the Progressive Conservative MP for the riding of Hamilton—Wentworth, becoming the youngest member of the Canadian House of Commons ever at that point (in 1974, Liberal Claude-André Lachance became the youngest-ever MP, and New Democrat Pierre-Luc Dusseault beat that record in 2011). He rose quickly through the ranks of the party and was seen as a future cabinet minister or even leader. He was re-elected in 1974. It was O'Sullivan's private members bill in 1975 that gained recognition for the beaver as Canada's official animal symbol.

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