Does the GOP want to be the Nasty Party?

David Frum looks at the GOP’s slide in support amongst voters under 30 and doesn’t like what he sees:

White young people continue to favor Republicans by a thin but real margin of 2 points. The Democrats owe their advantage among youth to a huge lead among young African-Americans (78 points) – and a very large lead (43 points) among Hispanics. In the past, Republicans could win elections despite their unpopularity among ethnic minorities. But with the huge surge of immigration since 1980 – and especially since 2000 –  the voting map of the United States has been redrawn in ways inherently deeply unfavorable to the GOP. If Republicans face an inhospitable future after 2008, we will hear much of the dreadful legacy of George W. Bush on social issues, the war, the environment, etc. But Greenberg’s own work makes clear that these issues matter relatively little… No, the legacy that will damage his party is the legacy of immigration non-enforcement.