JOHN ZMIRAK: For the Left, Libertarians are Like a ‘Cheap Date’. A better term, I think, is “useful idiot.” “Most libertarians argue for the free movement of peoples, and favor open borders. They say that absent a welfare state, people would spontaneously seek out opportunities, then when jobs dried up they would pick up and leave. Maybe this is true. But we will never find out because the welfare state isn’t going anywhere — in part because recent immigrants are heavy users of public benefits, so they almost universally vote for Democrats who will extend them. And impose onerous regulations on employers, nullifying their freedom of contract. And raise taxes. Low-skill immigrants serve the left as captive voters, undermining almost everything libertarians say they stand for. The left uses libertarians as human shears to cut holes in the border fence, then drops them and moves along.”