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Dalton James Patrick McGuinty Jr. is the full name of Dalton McGuinty, a Canadian politician who served as the 24th Premier of Ontario from 2003 to 2013. He was born in Ottawa, Ontario, on July 19, 1955. McGuinty is a member of the Liberal Party of Canada and has held various positions within the party, including Leader of the Opposition from 1996 to 2003.