Maybe he is contracting with Mexico to construct a wall on their northern border.
i would not trust a wall built by another country as our protection. I don’t know why people suggest this, have a country who has been harming us for decades be involved with some thing so important as protection of our country and citizens? Mexico has already shown us they don’t care about our country or citizens just what they can get for free/cheap from us.
If that is true, let’s hope that it’s American engineers who do the inspections.