Economy

See the Smoote-Halley Tariff Act and the Great Depression.
"Instead of stimulating the economy, it worsened the global economic downturn, leading to retaliatory tariffs from other countries and a decline in international trade. This drastic economic shift resulted in a 66% drop in world trade between 1929 and 1934, amplifying economic hardship."

As for trump's intentions to bring back lost domestic manufacturing, it'll take years to tool up with factories, many farmers will have lost their farms and there will be economic hardship.

Ya can't fight history. Tariffs cause recessions, and worse.