The manufacturer eats some of it, the importer eats some of it, the importer pressures the manufacturer to eat more of it. This is IF they want to still be competitive and sell their product in the US. The end US consumer barely sees any increase. The manufacturer continues to eat the increase or decides it's better to produce in the US to avoid the cost.
All of these points are true, but another effect of say a tarriff of 30% is that the local producer, can put up their prices by 20% and still be cheaper than the imported product.
The problems come when you look at specific products.
If Im american, and want a BMW, and can afford it, then I dont want a ford whatever, as an alternative.
For corn flakes, sure I like x brand, from Canada, but they are now $5 a box, USA made are $3 a box. But I like X brand....
So in some circumstances the customer can and will choose the local item, so no tarriff is paid, or in others the tarriff is paid.
Who in USA makes Ipads?? Or phones? Or rolls Royces?
Boeing will be happy, airlines much less happy, as they wont be able to play boeing off against airbus.
It is very disruptive - but thats why everyone is crying, and why Trump did it.
He doesnt want to negotiate on dog collars, for 5 years. then tape measures for 4 years.
So I accept that the plan was to negotiate them away.