In 2016 the US imported $416B and exported $270B to the EU. Although $11B is a large number, it's a 2.6% tax on the total. More interestingly, is what they are taxing. Personally, I'd rather have tariffs than income tax. At least then I can choose what to buy.
Some products which can be produced in US will benefit from tariffs. But the whole point of not having tariffs is to buy cheap labour from outside and move your own country up the value chain.
Also, no one is going to start manufacturing these products because the next President is going to remove the tariffs and destroy the advantages, if any.
Just my 2 cents.