Trump is using the wrong tool for the job, attacking the trade deficit with tariffs
Trump is trying to use tariffs to boost US companies, despite not taking into account that these controls are being applied to intermediate and capital goods, goods that are imported into the US to manufacture into other products. This will likely lead to a higher cost of production, which will only serve to decrease American competitiveness internationally. What is more, retaliatory sanctions imposed on US goods by affected countries will further hurt the US economy.
The best, and most well documented example of this is Harley Davidson who plan to move part of their manufacturing process to Europe as a result of Trumps economic policies. Last three years sales are falling 10% of Harley products, as a result of changing tastes in the market and fierce competition from rival manufacturers such as BMW, Honda, Ducati, Kawasaki, Suzuki. This move becomes especially clear when considering Europe and Japan now have a free trade policy, that means all the major Japanese Harley Davidson rivals will have lower production costs, sell cheaper, and be more competitive and therefore have higher sales across Europe.