Steven Guilbeault, Canada's Environment and Climate Change Minister, could leave the Liberal caucus as early as this week, according to government sources who spoke to CTV News. The potential departure would represent the most significant defection from Prime Minister Justin Trudeau's government and cast serious doubt over the future of federal climate policy.Sources familiar with the minister's thinking say Guilbeault has grown increasingly frustrated with the government's climate commitments, particularly around fossil fuel subsidies and emissions reduction targets. His potential exit follows months of tension between environmental imperatives and political pragmatism within the Liberal caucus, especially regarding pipeline approvals and oil sands development.The timing could not be worse for Trudeau, whose government already faces declining poll numbers and internal dissent. Guilbeault, a former environmental activist who joined Greenpeace protests before entering politics, has been the face of Canada's climate agenda internationally. His departure would signal to voters and international partners that even the architect of Canada's climate strategy no longer believes the government is serious about meeting its commitments.In Canada, as Canadians would politely insist, we're more than just America's neighbor—we're a distinct nation with our own priorities. Yet Guilbeault's potential resignation reflects tensions that transcend borders: how to balance economic interests, particularly in resource-dependent regions, with urgent climate action.Western provinces, particularly Alberta and Saskatchewan, have long criticized Guilbeault as hostile to their energy industries. Conservative Leader Pierre Poilievre has made attacking the minister's climate policies central to his campaign, calling them economically destructive. Yet environmental groups have simultaneously complained that Guilbeault has not gone far enough, pointing to Canada's continued approval of fossil fuel projects.If Guilbeault does leave caucus, he would join the ranks of independent MPs—potentially voting with the government on some issues while maintaining freedom to criticize from outside. The question facing political observers is whether other Liberal MPs frustrated with the government's direction might follow his lead, potentially threatening the government's stability in a minority Parliament.Climate advocates warn that Guilbeault's departure would effectively end any meaningful climate action from this government. Canada has already missed previous emissions targets, and confidence in federal climate policy depends heavily on Guilbeault's personal credibility within the environmental movement.The Prime Minister's Office declined to comment on what it called "speculation about internal caucus matters." Guilbeault's office similarly would not confirm or deny the reports. However, multiple government sources speaking on background confirmed that the minister has been in discussions about his political future and that an announcement could come within days.For international observers watching Canada's climate leadership, particularly as the country prepares to host upcoming environmental summits, the potential resignation represents a significant blow. Guilbeault has been instrumental in negotiating emissions agreements and representing Canada at climate conferences. His exit would raise questions about who could credibly carry that torch forward.The situation remains fluid, with some sources suggesting last-minute efforts to address Guilbeault's concerns and keep him within caucus. However, the very fact that such a prominent minister is contemplating departure underscores the deep divisions within the Liberal government over climate policy as it heads toward what promises to be a difficult election campaign.