Elections In government (2004-2006) While not invited to join
Paul Martin's
Cabinet, McGuinty served on the House of Commons Standing Committee on the Environment and Sustainable Development. He also served as chairman of the Liberal Party's
National Capital Region Caucus.
In opposition (2006-2015) On May 30, 2006, interim Liberal leader
Bill Graham appointed McGuinty as the Official Opposition critic for Transport. In the
2006 Liberal leadership contest, McGuinty endorsed the candidacy of
Michael Ignatieff. With the election of
Stephane Dion as leader of the Liberal Party McGuinty became the critic for Environment in January 2007. With the appointment of
Michael Ignatieff as leader of the party, McGuinty was named Environment and Energy critic when Ignatieff announced his shadow cabinet on January 22, 2009. In September 2010, McGuinty was promoted to the role of
Opposition House Leader. Following the resignation of Michael Ignatieff, Interim leader
Bob Rae named McGuinty as the
Liberal Party's Critic for Natural Resources in June 2011, a demotion from his previous position as Opposition House Leader.
Leadership aspirations In 2008, following the failed leadership of
Stephane Dion and his pending resignation, McGuinty was considered a potential candidate to succeed him but announced in November 2008, that he would not seek the leader and instead endorsed
Michael Ignatieff, Dion later appointed him as the critic for International Trade. In 2011, when Ignatieff led the Liberal Party to their worst result in its history, McGuinty's name was again mentioned as a possible candidate to succeed Ignatieff. At the Liberal Party's biennial convention in January 2012, McGuinty announced he was considering a bid for the leadership of the party and that he would make his decision over the coming months. However, on November 15, 2012, McGuinty confirmed he would not be seeking the Liberal leadership.
International work In 2012 McGuinty was elected to head the Canadian chapter of an international alliance of lawmakers, Globe International, that presses governments to address global environment and economy challenges. He received all-party support to become the president of Globe Canada on June 12. In 2012 McGuinty was invited by the
National Democratic Institute to join their Pre-Election Assessment Mission to Ukraine.
Oil and gas criticism On November 20, 2012, following a meeting of the Natural Resources Committee, McGuinty stated, among other things, that Conservative MPs were "shilling" for the oil and gas industry, did not belong in the national legislature, and should "go back to Alberta." The Conservative response was critical, as exemplified by Prime Minister
Stephen Harper who said: "I find it shameful, I guess not surprising, but shameful, that 30 years after the
National Energy Program, these anti-Alberta attitudes are so close to the surface in the Liberal party." Interim leader
Bob Rae apologized on behalf of the Liberal Party and said McGuinty was away on family business for the following week. The following day McGuinty resigned as natural resources critic. He apologized saying, "As member of Parliament for Ottawa South, I would like to unreservedly and unequivocally apologize for comments which I made with respect to parliamentary colleagues from the province of Alberta. My words in no way reflect the views of my party or leader, and I offer my apology to them as well as my colleagues from Alberta. I hold all parliamentarians in high esteem, and I regret my choice of words, as I can understand the offence they have caused."
Attendance record In early 2014, McGuinty was accused of being a "part-time" Member of Parliament by the Conservative Riding Association, who were subsequently unable to explain how they calculated McGuinty's time in the House of Commons, given that the House does not keep attendance records.
Back in government (2015-) NSICOP Chair In 2017, McGuinty was appointed as the first chair to the new established
National Security and Intelligence Committee of Parliamentarians (NSICOP). In 2024, as the chair of NSICOP, a report was released on
foreign interference in Canada's elections and society. It stated that the interference came from foreign governments such as
China,
India and
Iran. McGuinty stated that he welcomed Canadians having discussions on foreign interference. However, he took issue that much of the attention was focused on the revelations that some MPs worked with foreign governments and not other aspects of interference like the
media. McGuinty also stated that political party leaders should not be
partisan on the topic of foreign interference.
Minister of Public Safety Following a cabinet shuffle, McGuinty was appointed Minister of Public Safety in the
29th Canadian Ministry on December 20, 2024. ==Personal life==