Ernest Preston Manning is a retired Canadian politician. He was the founder and the only leader of the Reform Party of Canada, a Canadian federal political party that evolved into the Canadian Alliance in 2000 which in turn merged with the Progressive Conservative Party to form today's Conservative Party of Canada in 2003. Manning represented the federal constituency of Calgary Southwest in the Canadian House of Commons from 1993 until his retirement in 2002. He served as leader of the Official Opposition from 1997 to 2000.

The Conservative Party of Canada, colloquially known as the Tories, is a federal political party in Canada. It was formed in 2003 by the merger of the two main right-leaning parties, the Progressive Conservative Party and the Canadian Alliance, the latter being the successor of the Western Canadian–based Reform Party. The party sits at the centre-right to the right of the Canadian political spectrum, with their federal rival, the Liberal Party of Canada, positioned to their left. The Conservatives are defined as a "big tent" party, practising "brokerage politics" and welcoming a broad variety of members, including "Red Tories" and "Blue Tories".