Tariffs on goods and products are beneficial for the country and it's citizen, the ordinary Joe and Jane. The bad, this tariffs will charge to ordinary citizens through the product price tag. And the ugly, the economy, the purchasing power and the buying activities will suffer. It's like a movie. The Good, the Bad and the Ugly.
And for the idea quarantine and self sufficient. China already practice that long time ago. Maybe, that's the secret of there massive progress. I don't think it'll work in a democratic country where it's citizen has a problem of self entitlement.