Third, if we expect less-educated Americans to compete with low-wage workers in Asia and Latin America, we shouldn’t be welcoming millions of immigrants who compete with them domestically as well. Immigration benefits the economy over all, but it can lower wages and disrupt communities, and there’s no reason to ask an already-burdened working class to bear these costs alone. Here the leading Republican candidates have the right idea: We should welcome more high-skilled immigrants, while making it as hard as possible for employers to hire low-skilled workers off the books.