What will most pundits tell you about politics generally and the Republican Party specifically, though? That they are controlled by the monied class. Best Congress money can buy, and all that shit. Now, statistically, when wealthy people have consistent opinions, they tend to get their way. Good book: Martin Gilens's Affluence and Influence. I can argue with pieces of it, but it's a good book. Do "wealthy" people oppose the trade war? I... don't know.
I do know that investors oppose it. Watch the fuckin' market. The business world opposes it. If they could buy Congress off to take away Trump's authority, they would, but Republicans in Congress aren't controlled by money. They are cowed by Trump. Hence my observations in earlier posts.
Money doesn't buy policy. We knew this in political science long ago. This is just a demonstration. A frustrating and stupid demonstration, but a demonstration nonetheless.