The ole' "cross the border into someone else's territory and apply Seal team x as needed" seems pretty effective.
We could always follow it with Ranger military exercises just inside our borders that would somehow never actually complete...
I'm sure that the Mexicans would scream and demonstrate, but it would probably only be those within the government apparatus that benefit from drug gang profits and protection. Once properly identified, who knows what might happen?
MAGA - OK Boomer?