The Border is the Color Line of the 21st Century
Back in 1903, W.E.B DuBois wrote that "the problem of the Twentieth Century is the problem of the color line." And the 21st century color line is the border.
What was the color line? It was the line that reserved the best jobs in the economy for one group of people, while denying them to another through both the law and private institutions such as businesses and, to its discredit, many unions who refused membership and jobs to those on the wrong side of the color line. And it is the same color line that would refuse jobs to those on one side of "citizenship" and the border.