[Swordmaker]

If we demanded they manufacture here or face high tariffs, could they refuse?

Then other countries will impose retaliatory tariffs on our manufactured and agricultural goods. That never turns out well.

[poconopundit]

Well our balance of trade with South Korea is in the red.

One way or another Trump will negotiate to achieve balanced trade.

Each year, millions of foreign brand cars are made in the U.S. That came about because the U.S. insisted that the Japanese build a certain percent of their U.S. sold product here.