Unilateral tariff actions by major economies increasingly threaten the sanctity of rules-based multilateral/regional trade agreements. Discuss with reference to recent U.S.-Canada trade tensions and its implications for India's trade strategy.

On 22 August 2026 the U.S. imposed 50% tariffs on $20 billion of Canadian goods, inviting dollar-for-dollar retaliation from 8 September [3]. That two USMCA partners should trade coercion rather than adjudication shows how unilateralism now erodes the rules-based order from within.

The U.S.–Canada rupture: treaty commitments overridden

• Tariffs span steel, aluminium, autos and lumber — roughly 5% of Canada's exports to the U.S. — imposed while the USMCA review of 2026 was pending [3].
• The legal route was Section 338 of the U.S. Tariff Act, 1930 — dormant for nearly a century, requiring no investigation and carrying no time limit, thus bypassing the agreement's own consultation and panel procedures [1].
• Damage is precedential rather than total: about 85% of bilateral trade stays duty-free under USMCA, but the demonstration effect legitimises domestic law as a shortcut around treaty obligations [1].

Systemic strain on the multilateral architecture

• The WTO Appellate Body has had no members since December 2020, letting losing parties appeal "into the void"; retaliation becomes self-help, not adjudicated remedy [2].
• Reciprocal "dollar-for-dollar" matching displaces proportionality review, making tit-for-tat escalation the default norm.

Implications for India's trade strategy

• Market diversification: the Economic Survey 2025-26 cites Indian pharma's pre-emptive reduction of U.S. dependence amid generic-drug tariff uncertainty as a template of capability-building and repositioning [4].
• Widening the FTA net: India-EFTA TEPA (in force 1 October 2025), alongside UAE and Oman CEPAs, spreads risk across markets [5].
• Better-drafted agreements: binding dispute settlement, safeguard and snapback clauses, plus recourse to MPIA-style arbitration under DSU Article 25 [2].
• Coalition diplomacy with the Global South for restoring WTO dispute settlement.

Unilateral tariffs deliver short-term leverage but corrode the predictability on which trade itself rests. India's interest lies in being diversified enough to absorb such shocks and credible enough to lead their reform — pursuing calibrated openness while championing a restored, rules-based WTO consistent with its stated commitment to reformed multilateralism.