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Our Substack leverages our proprietary databases and analyzes the subnational impacts of international trade, answering questions like which states are most impacted by specific tariff announcements, which counties have the most export-related jobs, which congressional districts depend most on exports to a given market…etc. Free subscribers will receive timely analyses such as these every week.
Trade Partnership Worldwide’s Latest Substacks
The Challenge of Politically Motivated Tariff Revisions (October 30, 2026)
Changes to the Section 338 tariffs on Canada, which many say aim to help Republican Senator Susan Collins’ campaign, create winners and losers both within and among swing states.
Digging into the potential Board of Trade “30-for-30” tariff reductions (September 28, 2026)
Data show covered import values are likely to be much lower; some states see particular benefits while others, including importers that shifted sourcing to other countries, could lose out.
U.S. exports to China: rising and falling tides don’t affect all boats (September 25, 2026)
How export trends to China differ between congressional districts, including examples of districts that have bucked national trends since 2018
The $355 billion question: what have extra tariffs on China accomplished? (September 23, 2026)
A look at tariff costs on imports from China since 2018
Put-in an estimate on potential Russian sanctions bill secondary tariffs (September 14, 2026)
Congress could vote to give new tariff authority to the President this week, but there has been little discussion of potential U.S. impacts
Why estimating state export retaliation impacts is so much harder than it seems (September 8, 2026)
A methodology post for the data nerds (or those looking to increase their trade data understanding).
What a difference a day makes: how Canada’s 338 retaliation revisions changed U.S. impacts (September 3, 2026)
Part 3 of our analysis on Canada’s retaliatory tariffs: who were the winners and losers from Canada’s revision of the retaliatory tariff list?
Canadian retaliatory tariffs concentrated around the Great Lakes (September 1, 2026)
Part 2 of our analysis on Canada’s retaliatory tariffs: 7 of the 9 states with at least $1 billion in potentially affected exports border a Great Lake (whatever anyone decides to call them)
Canada’s Section 338 retaliation: breaking down U.S. state impacts (August 31, 2026)
Part 1 of our analysis on Canada’s retaliatory tariffs: Examining the states with the highest shares of their exports to Canada affected by retaliatory tariffs
The biggest U.S. losers and (mostly) bullet dodgers from Section 338 tariffs on Canada (August 19, 2026)
How the luck of the draw impacts where tariffs will be felt most acutely