I didn't want to embarrass you, but you insist, so. . .
Considering that the opioid crisis is about opioids manufactured in the U.S., I suppose it could stop whatever percentage are made in the U.S., shipped to Mexico for some reason, then brought back across the border into the U.S. by land, rather than by sea or air, by illegals crossing at unauthorized points. Call it 0.000001%.
Yep, that's definitely worth 40 billion and 5 billion a year in maintenance and upkeep.
You're almost as smart as your Dear Leader.