Swiss voters went to the polls Sunday and resoundingly rejected capping the country’s rapidly growing population at 10 million by limiting immigration. Congratulations to the Swiss for staging a national conversation over immigration — something the United States urgently needs to do. The Swiss have seen their population soar by more than 25% since 2000. The newcomers are for the most part workers from neighboring European countries, not migrants from the Middle East or Africa.  Even so, the