Press Release - Youth for Diefenbaker, 1967

A press release from Youth for Diefenbaker, 1 August 1967. The release reads: "Hamilton Student Appointed Youth for Dief Representative. The youngest delegate to the conservative leadership convention, 15 year old Sean O'Sullivan of Hamilton, has been 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. According to Mr. O'Sullivan, there is growing support for Mr. Diefenbaker and he will have an announcement to make in that regard at a press conference on Friday August Fourth at the Connaught Hotel."

Letter - Sean O'Sullivan to John G. Doherty, 28 April 1975

A letter from Sean O'Sullivan to John G. Doherty, editor of The Spectator, 28 April 1975. The letter includes comments from O'Sullivan regarding the direction of the Progressive Conservative Party.

Sean O'Sullivan Speaks Out Speech, 28 October 1970

A speech given by Sean O'Sullivan, 28 October 1970, at the Annual Meeting of the Fort Erie Progressive Conservative Association. He was President of the Ontario Young Progressive Conservative Association at the time and chose to speak out on his personal position against Marijuana.

Brock Essay - The Chateau Cabinet

An essay submitted to Professor J.E. Anderson by Sean O'Sullivan, 10 November 1975. The essay entitled, The Chateau Cabinet: A Case Study in Intra-Party Conflict, studies how "internal discontent---be it based on philosophical or personality difference---leads to intra-party conflict---and the roots of such discontent are indeed strong within the Progressive Conservative Party."

Photograph - Sean O'Sullivan, 1971

A photograph of Sean O'Sullivan, Ontario Young Progressive Conservative President, "addressing 1971 Ontario Leadership Convention, Maple Leaf Gardens, February 1971.