We need the genes of illegal immigrants

Immigration can improve the national gene pool:

Geneticists have shown that there is literally such a thing as American DNA, not surprising when nearly all of us are descended from immigrants. We therefore carry an immigrant-specific genotype, a genetic marker expressing itself—in some environments, at least—as energetic risk-taking and competitive self-promotion. Even when famine, warfare, or another calamity strikes, most people stay in their homeland. The self-selecting group that migrates, seldom more than 2 percent, is disproportionally inclined to take chances. They also have above-average intelligence and are quicker decision makers. Something about their dopamine-receptor systems, the neural pathway associated with a taste for novelty and risk, sets them apart from those who stay put.

And illegal immigrants take more risks than anyone else.