Mass Immigration Creates Problems For the Left. Tighter Borders Can’t Be the Solution. – New York Magazine

Migrants march with American flags, shortly before some evaded a police blockade and rushed toward the El Chaparral port of entry in Tijuana, Mexico.
Photo: Mario Tama/Getty Images

In the United States today, the rich lay claim to a higher share of our nation’s wealth than they have at any point since the Gilded Age — and foreign-born residents account for a higher share of our nation’s population than at just about any time since that same era.

In his 2016 book, The Great Exception: The New Deal & The Limits of American Politics, the historian Jefferson Cowie suggests that these two developments are related. His case is simple: It is hard to implement egalitarian economic policies in the absence of working-class solidarity — and it is hard to achieve the latter in a context of mass, multi-ethnic immigration.