Re: Even American military arms suppliers can't compete in the US market
Then he'll slap the same tariffs on Mexico.
Trump's rules are very simple: importing is for losers, winners (or "cheats", if they're foreign) export.
If the country as a whole is idiot enough to give him his head (which currently I wouldn't bet a groat against), I'm sure he can, in time, foster a thriving US domestic industry in manufacturing everything on the list, no matter how obscure or mundane. Of course they'll be more expensive and lower quality than the imports, but they'll be AMERICAN, dammit!, and that's what matters.
The depressing part is, this will actually create jobs. Incredibly wastefully, but still - jobs. The economy as a whole will be trashed (in much the same way, and for much the same reasons, as the Soviet Union's economy was during the Cold War), but everyone will be working, and it will take a long time for the reality to percolate that the whole country has been basically frozen in time while the rest of the world moved on.
I've known this whole century that we were seeing the end of American power. I'm just amazed at how quickly it's happening now.