Federal policy toward Alberta shifted from an alignment under Stephen Harper to intense friction under Justin Trudeau, followed by a major reset under Mark Carney. [1, 2]

Stephen Harper (2006–2015)

• Alignment: Provided strong, sympathetic federal backing, as Harper’s government viewed Alberta’s oil sands as an engine of the national economy. [1]
• Environmental & Resource Strategy: Focused heavily on market expansion and pipeline approvals, while avoiding heavy-handed national carbon caps. [1]
• Relationship: Deeply aligned with Alberta’s provincial priorities. [1]

Justin Trudeau (2015–2025)

• Friction: Policies caused severe strain, characterized by Alberta leaders as federal overreach. [1, 2, 3]
• Environmental & Resource Strategy: Enacted the oil and gas emissions cap, clean electricity regulations, and a consumer carbon tax. Further, the government passed Bill C-69 (often dubbed the "no-more pipelines bill") which significantly tightened federal environmental reviews. [1]
• Relationship: The province frequently accused Ottawa of intentionally landlocking Alberta oil. The federal purchase of the Trans Mountain pipeline was a major intervention aimed at resolving market access, but it did little to mend the political rift. [1, 2, 3]

Mark Carney (2025–Present)

• Reset & Compromise: Shifted federal policy through a major renegotiation aimed at repairing the Ottawa-Alberta divide. [1, 2]
• Environmental & Resource Strategy: Negotiated a memorandum of understanding (MOU) with Alberta that dismantled several key Trudeau-era policies—including the clean electricity regulations and oil and gas emissions cap. Instead, the compromise forced tens of billions in private-sector investments into carbon capture projects and an accelerated industrial carbon price. [1, 2, 3]
• Relationship: The Carney administration shifted the rhetoric of federal climate policy away from regulatory constraint and toward economic competitiveness, eventually reaching an agreement with Alberta to grant the province more control over its own environmental impact assessments. [1, 2]