Who: Dalton McGuinty, leader of the Ontario Liberal Party.
Age: 57 (July 19, 1955)
Personal: Born and raised in Ottawa. The eldest of 10 children. Married since 1980 to Terri, a teacher. They have four grown children.
Education: McGuinty earned a bachelor of science from McMaster University and a law degree at the University of Ottawa.
Politics: He was first elected to the Ontario legislature in 1990 to represent Ottawa-South, and was elected Liberal party leader in 1996. He was elected premier with a majority in October 2003 and again in October 2007, before being reduced to a minority in October 2011.
Resignation: Beaten down by a series of scandals, McGuinty announced Monday he was stepping down as Liberal leader and adjourning the legislature because his minority government can't pass legislation to freeze public sector wages.
Quote: "To that end, I spoke with the president of our party and asked that he convene a leadership convention at the earliest possible opportunity."