Mexican Army at their southern border is fascinating. I’m more concerned about their northern border.
The people coming in on our southern border are mostly not Mexicans. Mexico needs population, because it has been so dysfunctional for so long that anybody of working age who could do so fled to the US. The people trying to break through Mexico’s northern border aren’t Mexicans, but the thousands of Central Americans, Africans and Middle Easterners who are being funded through Cuba and the left.
I think the thing that Trump did that was the most convincing was that he reminded Mexico that its national sovereignty was being violated by this invasion from the south. The Mexicans hate it, and I think AMLO (a raving leftist but elected because he wasn’t from either of the major parties) saw this as a chance to deal with the problem but at the same time not have to take it on himself.
Mexico southern border 697 miles. Northern border 1,952 miles. Most of the invaders today come from Central America.
Neither land border is the total problem (visa overstays etc.)