At the point it's no longer free play, this trade war has become Trump's biggest political asset. Almost all his other policies failed or attracted huge backfire. If he backs down on trade it basically meant the end of his political life and it will deal a huge blow to the GOP as well.
If full blown $500 billion tariff levied which wipe out all China exports to US, it will cause big inflation.
And if China adopts a zero sum attitude, meaning as long as thing can get the other side hurted, and even self damage would be justified. Kind of what US thinking currently. Then China would dump the US treasury.
This two combined will pretty much cause US into recession.
US housing market already slowing down alot.