"Above all other unintended consequences of immigration engineering has been the flourishing of undocumented immigration," writes Elizabeth Cohen, associate professor of political science. Before the US began to enforce the 1924 Johnson-Reed Act (the first version of “comprehensive immigration reform”) there really was no such thing as undocumented immigration as we know it, she says. "It was invented by legislators who wanted to close the border. And the vast, costly deportation apparatus that has been built as a result has created new problems, too." Cohen's article, "What Immigration Restrictionists Can’t Foresee," was published in The Atlantic. 03/13/19