Gretchen Whitmer, the governor of Michigan, wrote an op-ed in Wednesday’s paper. It is a partisan document and it should be read as one. It also carries numbers that do not become less true for appearing under a politician’s byline.
The figures
Michigan families shoulder the country’s highest tariff burden, more than $5,600 a household since January 2025, according to the National Taxpayers Union Foundation. U.S. auto exports to Canada are down 23% over the past year. Michigan’s agricultural exports are down by as much as 89% for some crops.
Talks between the two countries broke down in August. The administration imposed 50% tariffs and has threatened more by year-end. Canada announced reciprocal “dollar for dollar” duties covering $1.5 billion of Michigan exports, auto parts among them.
Why this one state
Michigan’s auto sector is deeply integrated with Canada’s. It accounts for one in five private-sector jobs in the state, and the Detroit-Windsor crossing is the busiest in North America. An American car contains tens of thousands of parts, and many of them cross the border more than once before the vehicle is finished.
That last detail is the mechanical heart of it. A tariff on a border that a component crosses four times is not a 50% tax. It is closer to four of them.
Where it shows up for a household
Whitmer’s list is the ordinary one: motorists wincing at the pump, shoppers putting fresh produce back on the shelf, families draining savings for school supplies, one Michigander worried about heating her home this winter.
That is the useful part for anyone reading from outside Michigan. A tariff is a tax that never appears on a tax return. It arrives inside the price of a thing, which means it is invisible in the place where people normally look for taxes and perfectly visible in the place where they look for inflation.
It is also why a quarter-point increase in the federal funds rate is a weak instrument against this particular price pressure. The Fed can raise the cost of borrowing. It cannot lower the cost of a part that crossed a border four times.
What to do with a political document
Read the numbers, discount the conclusions, and check what it means for the plan rather than for the argument.
For most households the honest answer is: nothing to trade. A household with concentrated exposure to a single automaker, a supplier, or a Michigan-heavy employer’s stock plan has something more specific to look at — not because the news is new, but because concentration is the thing that turns a regional story into a personal one.
The sentence worth keeping is the one Whitmer uses about her own limits: a governor cannot change trade policy or end inflation. Neither can a portfolio. What a portfolio can do is not be arranged so that one border crossing decides the outcome.