Mexico can do the China game.
Meticulous inspections of US products entering Mexico... and thorough checks of all goods being shipped to the US from American owned factories. Plus, they could do unannounced shutdowns of the border checkpoints, as well.
Searching for drugs and smuggling tunnels at the checkpoints, you see. And they need to see if the goods being shipping to the US actually meet US standards. Plus, is the paperwork correct and with no mistakes?
---
And that's not even starting with reciprocal taxs/tariffs.