Actually, I believe he intends to increase various fees for Mexico doing business in the US and also tariffs.
I am sure he will come up with something, He would have the wholehearted support of the American people. It is a national security issue.
Decreasing the amount of foreign aid we give to their government would take car of it. Iirc the amount is staggering! Money to help fight drug war f
Goes into corrupt hands. Stop sending it