On June 10, President Trump declared he was not looking to renew the U.S.-Mexico-Canada Agreement, asserting that America does not need either neighbor as a trading partner. It is a striking claim, and a false one. Tearing up North American integration would not punish Canada and Mexico so much as the American workers and consumers whose livelihoods are stitched into those supply chains.
The Tax Households Are Already Paying
Start with the numbers we already have. The current tariff regime amounts to the largest U.S. tax increase as a share of GDP since 1993, costing the average household about $1,500 in 2026. A new USTR proposal would layer on a minimum 10 percent across-the-board tariff on partners including Canada and Mexico, with 12.5 percent for others. Tariffs are not paid by foreign governments. They are paid at the checkout, the dealership, and the lumber yard.
Supply Chains Don't Stop at the Border
The fantasy that the U.S. can simply do without its neighbors ignores how North American manufacturing actually works:
- Auto parts cross the border multiple times before a finished car rolls off the line.
- Energy, agriculture, and electronics are deeply integrated across all three nations.
- Mexican and Canadian inputs keep U.S. factories cost-competitive against Asia.
- Ripping up the deal raises costs on the very manufacturers it claims to protect.
Discretion Is Not a Strategy
There is a deeper problem with governing trade by improvisation. The courts are already pushing back: in February the Supreme Court ruled the President cannot use emergency powers to impose tariffs, and Section 122 authority expires in July. Policy that swings on a sentence in a press conference, with deals announced and paused in 60-day windows, is impossible for businesses to plan around. Uncertainty itself is a tax, freezing the investment that durable agreements are meant to unlock.
The Leverage Illusion
Defenders of the walk-away threat call it leverage, the art of the deal applied to nations. But leverage works only when the other side believes you will not harm yourself more than them. Canada and Mexico run economies deeply intertwined with America's, and both can read a balance sheet. They know that a tariff wall on integrated auto and energy supply chains raises U.S. factory costs, fuels domestic inflation, and invites retaliation against American farmers and exporters. A threat that wounds the one making it is not leverage. It is a bluff that trading partners can wait out, especially when courts keep striking down the legal basis for the tariffs and the clock runs out on emergency authority in July. Real negotiating strength comes from a credible, lawful, predictable position, not from theatrical brinkmanship that markets and capitals have already learned to discount.
Renegotiate, Don't Detonate
None of this means USMCA is sacred or beyond improvement. Trade deals should be updated, and the U.S. is right to press for better terms on autos, labor, and digital trade. But there is a vast difference between hard-nosed renegotiation and threatening to walk away from the most successful trading bloc America has. The first strengthens leverage. The second hands an advantage to distant competitors while raising prices at home. On this one, the bluster and the arithmetic point in opposite directions, and the arithmetic should win.