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EventAction

Mexico's tariffs of 5-50% on 1,463 lines from countries without a trade agreement with Mexico (including China) take effect (about US$52B, 8.6% of imports)

Published in Mexico's Official Gazette on Dec 30, 2025, after the Senate approved them 76-5 in December; the approval is recorded as a separate event.

Date
Kind
Tariff action
Where
Mexico
Evidence
Action: Something was done: a law switched on, a tariff imposed, money committed. How evidence is weighed
Who
Government of Mexico (acted); Government of China (target)

Evidence for

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Claims that rest on this event

Tested hypotheses: a thought experiment

Suppose Washington foresaw and wanted this. Would this event look any different than under the rival readings? This is a deliberately contrarian test, explained here, not the author’s belief. Judgments, not measurements.

Judged to fit the foresight reading better than the plain self-interest reading. What this means

ReadingFitWhy
I0a Accident
Tested hypothesis (intent)
Neutral weakThis measure concerns Mexico and China, not Canada; it fits all readings equally and says nothing about Canada's build-out or about Canada as a target.
I0b Plain self-interest; Canada's response not considered
Tested hypothesis (intent)
Neutral weakThis measure concerns Mexico and China, not Canada; it fits all readings equally and says nothing about Canada's build-out or about Canada as a target.
I1 Foreseen and welcomed, not the reason
Tested hypothesis (intent)
Fits weakA partner adopting a measure that serves US goals after US pressure shows the pressure-then-response pattern in general; it concerns Mexico and China, not Canada's resources, so it moves little.
I2 Foreseen and wanted (this level or higher)
Tested hypothesis (intent)
Fits weakA partner adopting a measure that serves US goals after US pressure is consistent with the pressure-then-response mechanism in general; it concerns Mexico and China, not Canada's resources, so it moves little.
I3 Worked-out plan with specific targets
Tested hypothesis (intent)
Neutral weakThis measure concerns Mexico and China, not Canada; it fits all readings equally and says nothing about Canada's build-out or about Canada as a target.
R-annex Annexation
Rival reading
Neutral weakThis measure concerns Mexico and China, not Canada; it fits all readings equally and says nothing about Canada's build-out or about Canada as a target.
R-frag Fragmentation
Rival reading
Neutral weakThis measure concerns Mexico and China, not Canada; it fits all readings equally and says nothing about Canada's build-out or about Canada as a target.
R-weaken Weaken-Canada rivals (annexation or fragmentation)
Rival reading
Neutral weakThis measure concerns Mexico and China, not Canada; it fits all readings equally and says nothing about Canada's build-out or about Canada as a target.