American to the core

At Politico George J. Borjas writes,

...regardless of what you think about the Trump candidacy, the next time you hear that Trump’s proposal for immigrant vetting is un-American, the correct response is that it is American to its core. And the next time you hear that Trump’s proposal is crazier than crazy, the correct response is that—given the mess the world is in—it is the notion that we should not vet immigrants more carefully that is certifiably insane.

Read more here.