Earlier quoted context omitted.
> If the economic hurt this causes to China is enough to drastically reduce the flow of fentanyl into the US What if the economic hurt this causes to China drastically increases the flow of fentanyl in the US?
Then block all trade outright with China if they show themselves willing to be so openly belligerent.
Why would they need to be open about it? But also: the time to do that was 30 years ago.