We regret but have to temporary suspend the shipments to USA

> importers must declare the exact amount of steel, copper, and aluminum in products, with a 100% tariff applied to these materials. This makes little sense—PCBs, for instance, contain copper traces, but the quantity is nearly impossible to estimate.

Wow this administration is f**ing batshit insane. I thought the tariffs would be on raw metals, not anything at all that happens to contain them.

I manufacture steel/aluminum goods for the US and I have direct experience with these tariffs. Let me explain why it must be this way and how it's actually supposed to work. This is not a defense of the tariffs, just an explanation.

First of all, if you want to use tariffs to boost domestic manufacturing, you must also tax the steel/al content of finished (or intermediate) goods. Otherwise, you put your local producers at a disadvantage, making the tariffs worse.

If you only tariff raw materials, then an american manufacturer has to pay either US steel prices or imported steel + tariff to manufacture, but a company overseas can use the cheaper foreign steel.

So if you want to tax raw materials, then you also want to tax those goods where raw materials are an important part of the cost.

The US has a catalog called the "Harmonized Tariff Schedule" (HTS) which is a catalog of basically everything under the sun [0]. When the steel & AL tariffs were announced, they also published a list of all the HTS codes where the steel/al content would also be taxed.

Last week the US published a revised list of HTS codes to which these tariffs apply, and they added about 400 items to them. For example, the aluminum content of cans is now taxed when it wasn't before.

Flexport has a very cool (and useful!) tariff simulator where you can look up any item and it will tell you if the steel/al content will be subject to these tariffs: https://tariffs.flexport.com

[0]: https://hts.usitc.gov/

> Otherwise, you put your local producers at a disadvantage, making the tariffs worse.

Disadvantaging local producers is how tariffs work! Local producers would then turn to local suppliers who don't have any additional taxes applied. Tariffs are a very blunt instrument, and clumsily attempting to assuage 2nd order pain points will only give rise to 3rd (and higher) order effects.

The lesson here is: don't fuck around with multivariate dynamic systems that have achieved stability: there won't be any one knob you can twist to get a result you want on a single parameter. It'll be worse if you pick one knob and turn it all the way to 11.