The Fed will just create more money like they already do. Because Politicians suck at economics.Historically, changes in China tend to go from bad to worse. Their economy has been very bad the last couple of years.
Of course, if China falls apart - even for a short time - what happens to Biden's economic plans (ok "plans"). China is by far our biggest lender. If they won't buy our worthless bonds, the Build Back Better Bust will be historically bad.