The harm caused by Trump’s protectionism will offset the benefits of his good policies.

Trump repeatedly has demonstrated that he has no idea how trade works.

There’s a lot Trump doesn’t understand about trade, but not everything he says is wrong.

History may be repeating itself.

Trump seems inspired by Herbert Hoover.

Bad policy begets bad policy.

Retaliation by our trading partners already is causing problems.

Here’s some of the destruction that may occur.

Protectionism is a punitive form of government intervention.