According to John Hawkins's article today, illegitimacy rates for women under 30 are 73 percent for blacks, 53 percent for Latinos, and 29 percent for whites. It would seem that reports of the cultural conservatism of our Latinos are somewhat exagerrated, to put it mildly.
Arguably, there is something to be gained by stapling a green card to an American diploma earned by a foreign graduate in science or engineering. (And we are going to need more foreign doctors.) On the other hand, if the GOP helps to open our borders still more or to legalize the current illegals, it will simply be creating more voters for the Democratic Party. The Latinos, as a group, have been bought by the Democrats and are not for sale.