I’ve often said that the Democratic Party is cagey in limning its own immigration program in response to Trump’s own odious, kneejerk, and constantly changing policy. I haven’t seen much about a Democratic immigration program, though I haven’t paid a lot of attention. My own take is that Democrats are stuggling to formulate such a policy. And to many voters it seems that the Democrats want open borders in the U.S.—a policy that simply won’t work, either for the functioning of the country or as a stand that could help Democrats get elected in 2020.

But one party to which at least two House Democrats and one Senator belong, has just espoused open borders at its national convention: The Democratic Socialists of America. Two congresswomen elected as Democrats are also members of the DSA: Alexandria Ocasio-Cortez of New York and Rashida Tlaib of Michigan. Bernie Sanders is also…