That used to be the conservative position on immigration. Seriously. Pre-WWII, it was labor unions and liberals who were anti-immigration. The libertarian position is still pro-immigration. On net, immigration makes our country stronger. Only the most determined and fit Guatemalans are riding the "Death Train" and sneaking through the desert, just like 120 years ago only the most determined and fit Irish, Italians, and Germans were crossing the ocean with nothing in their pockets. In a country like ours that is geographically isolated and hard to reach, a generous immigration policy enables us to basically skim the cream of the crop from the rest of the world. This is especially so because our social safety nets are skimpy, compared to Europe, and designed to exclude immigrants, so they cost us relatively little for the work ethic and human capital they bring to the table.