Trump's threat to tariff Canada over wildfire smoke hands critics a textbook case of executive adventurism that conservatives should reject outright. Without identified statutory authority or congressional consent, such levies would amount to unilateral punishment rather than lawful trade policy, exposing Americans to higher costs while inviting reciprocal barriers. The administration's silence on the mechanism only underscores how easily policy impulses can drift beyond constitutional bounds. The Framers vested Congress with power to regulate commerce and lay duties precisely to prevent one man from turning foreign relations into personal score-settling. Free markets and federalism both suffer when the executive improvises barriers that distort prices and supply chains for political theater. Originalist restraint demands that even favored ends respect the separation of powers the Constitution erected against arbitrary rule. Conservatives defend limited government by insisting every president, including this one, stay within the lines the Founders drew.