>>4027322
El Paso crossing alone.
El Paso is the largest metropolitan area on the Texas border, and the El Paso-Juarez-Las Cruces region calls itself one of the largest binational regions in the world, with 2.5 million people. Thousands of people cross both ways over the border every day—Mexican elementary kids heading to U.S. public schools, U.S. residents working in Ciudad Juarez, students attending U.S. colleges and universities.
Closing the border?
Probably not too long before they get really pissed off.
https://www.theatlantic.com/business/archive/2016/01/crossing-the-mexican-american-border-every-day/426678/