The federal govt already owns a swath north of the border, plenty for a double or triple fence like the one that stopped border crossing cold in the San Diego sector. It could be built all the way to the Gulf of Mexico in under a year. They don’t want to control the border.
“The federal govt already owns a swath north of the border,..”
A fence north of the border would cost some American farmers their water access. Better to put it on the south side, screw Mexico.