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Steven Guilbeault to quit as Liberal MP this summer

Click to play video: '‘Things change’: Carney wishes Guilbeault ‘all the best’ for his future'
‘Things change’: Carney wishes Guilbeault ‘all the best’ for his future
Speaking at the CANSEC defence conference on Wednesday, Prime Minister Mark Carney wished Liberal MP Steven Guilbeault — amid speculation that the former minister could be quitting the party — “all the best” for whatever he chooses to do with his career next. Carney added that he understands “things change.” – May 27, 2026

Montreal-area MP and climate activist Steven Guilbeault says he will resign his seat in the House of Commons later this summer, according to a statement posted to social media.

Guilbeault said he will remain a member of the Liberal caucus until he resigns. He informed his caucus colleagues of his decision Wednesday morning in their weekly meeting, a day after Global News reported his plans to resign.

The decision to quit was a “result of careful consideration,” Guilbeault said.

“After almost seven years as a Member of Parliament and Minister, I have come to the conclusion that it is time for me to pursue my fight for environmental protection and the fight against climate change in a different way,” he said in his statement, thanking the residents of his riding Laurier-Sainte-Marie for electing him to Parliament.

In a speech to the House of Commons Wednesday evening, Guilbeault defended his record as a fierce climate policy advocate in Justin Trudeau’s cabinet and pushed back on critics’ claims he was “anti-development.”

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“There are many reasons that lead people to enter politics,” he said. “In my case, it was a desire to pursue my quest for a better environment, for the fight against climate change, and for nature protection.”

“The struggle for our planet is defining for our generation, and I will continue to fight,” he said in French. “I fully intend to continue fighting.”

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He noted the climate adaptation policies he championed as environment minister, including emissions regulations and other measures, “were working” and making a difference.

He did not mention Prime Minister Mark Carney’s rollback of some of those measures, including the consumer carbon price, as he pursues an energy agreement with Alberta.

Guilbeault became emotional as he thanked his family, friends, staff and colleagues, who he said “gave me far more than I could ever give back.” Liberal MPs gave him a standing ovation after his speech.

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Carney’s slim majority in the House of Commons will get razor thin after Guilbeault’s resignation.

After three key byelection wins in April, Carney’s Liberals secured a majority, taking their numbers from 171 to 174. Guilbeault’s resignation would put them at 173, just one more than the 172 needed for a majority.

Earlier in the day, Carney said he wishes Guilbeault “all the best” in whatever he chooses to do with his career next.

Carney said he understands that “things change.”

“It’s for him to make decisions about his career in the next stage of the career. All aspects of all our careers, even journalists, even prime ministers, get to a point where things change and they make people make decisions,” Carney said.

Click to play video: 'Liberal MP Steven Guilbeault expected to resign'
Liberal MP Steven Guilbeault expected to resign

Carney thanked Guilbeault for his contributions to his Montreal-area riding as well as to the party, adding that he enjoyed working with him.

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“We worked together when I was UN special representative on climate action and finance as well. We work together closely in a variety of areas, and I have always enjoyed working with him,” Carney said.

Guilbeault’s political future within the Liberal Party of Canada has been in doubt ever since he quit Carney’s cabinet over the deal with Alberta that could see a new oil pipeline built to the West Coast.

Before entering politics in 2019, Guilbeault was a climate activist for Greenpeace.

— with files from Global’s David Akin and Sean Boynton

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