Former Bush speechwriter David Frum is a critic of leftist immigration policy. Most recently, he published an article called “If Liberals Won’t Enforce The Border, Fascists Will.” But Frum has also claimed unique personal authority on immigration. “I speak from inside the issue,” he writes, because “I was born in one country and am now a resident of another,” having emigrated from Canada to attend Yale. Now, in “I, Immigrant,” we retell the harrowing story of Frum’s migration, so that the public can understand the personal struggle that forged his deep understanding of the immigrant perspective.