Former environment and climate minister Steven Guilbeault resigned from Prime Minister Mark Carney’s government and the Liberal caucus on May 27, 2026 [1].
The departure signals a significant rupture within the governing party regarding Canada's environmental trajectory. As a high-profile climate advocate, Guilbeault's exit suggests a widening gap between the administration's policy goals and the expectations of its environmental wing.
Guilbeault said the Prime Minister's approach turned its back on climate action. He specifically cited a proposed pipeline as a primary point of contention, saying he could no longer support the government’s climate direction [1], [2].
"I cannot stay in a government that turns its back on climate action," Guilbeault said [1].
While the resignation marks a public disruption of caucus unity, other members of the party have expressed support for the current administration. An unnamed co-chair of the Liberal climate caucus said he supports Prime Minister Mark Carney’s policies [3].
Prime Minister Carney has maintained that his climate plan will withstand the test of time despite the criticism [4]. However, the move by Guilbeault has drawn attention to the shift in strategy from previous administrations. Columnist Raymond J. de Souza said Carney appears to be casting off the climate policies established under former Prime Minister Justin Trudeau [5].
The resignation took place in Ottawa, where the political fallout may impact the government's ability to present a unified front on upcoming environmental legislation [1], [2].
“"I cannot stay in a government that turns its back on climate action."”
Guilbeault's resignation represents a pivot in the Liberal party's internal dynamics under Mark Carney. By prioritizing a proposed pipeline over the strict climate mandates championed by Guilbeault, the Carney government is signaling a more pragmatic or industry-aligned approach to energy. This shift risks alienating the environmental base of the party and may lead to further instability within the caucus as the government balances economic development with international climate commitments.
