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That would indeed be huge share for a single immigrant nation. But by 2050, the descendants of the first Mexican immigrants will be into the fourth or fifth generation. The question is whether by then they will still be a strongly distinctive group. The signes are that, following in the paths of their Irish and Italian predecessors, they will have become assimilated.

Before that, though, stop to consider some of the effects that the immigrants are alredaly having. New arrivals tend head for New Your, Los Angeles, San Francisco, Chicage, Miami and other cities. Oer half the immigrants first settle in one of these gateways, and two-thirds of the foreign-born population live in states surrounding them. This is not surprising. The gateways contain at home. The law reinforces this clustering, because familiy reunification is a common means of legal entry.