Danielle Kurtz-Lehman

The rate on those tariffs has changed this year.

But even beyond that, the steel and aluminum products that that tariff covers also have changed.

For example, in August, the administration added more than 400 categories to the list of what is affected by those steel and aluminum tariffs, everything from kitchen knives to fire extinguishers.

And the administration argued that that was meant to stop firms from circumventing the tariffs.

But

Even if that's true, that example still shows that even when a tariff rate is set, the tariff itself can still drastically change.