Americans have always been ambivalent about immigration, with realistic concerns bumping into altruistic, even romantic notions. The romance is summed up in the famous 1886 inscription on the base of the Statue of Liberty, proclaiming ''give us your tired, your poor, your huddled masses yearning to breathe free.'' The ambivalence was expressed a mere four years earlier, when Congress enacted the first immigration restrictions, specifically excluding "paupers, ex-convicts, mental defectives and Chinese." That was at the beginning of the greatest wave of immigration in American history, which brought in 18 million new citizens, diversified U.S. society and gave us the enduring analogy of the ''melting pot.''
Now the United States is in the midst of another great wave of immigration, which brings in roughly one million new residents a year, but has yet to give us a new analogy. More than one in 10 U.S. residents are immigrants, and while that's the highest share of the overall American population since the 1930s, it's still below the high of 15 percent recorded in 1890 and 1910, according to the Census Bureau. Most of the new immigrants come from Latin America and Asia. Like the earlier wave, the influx is likely to fundamentally change America, but Americans have yet to work through how they feel about it. Immigration
policy is about deciding what kind of country the United States is going to be.