Sign 'em up for free health care, welfare, give their kids scholarships, give them a new condo through eminent domain...well, you get the idea.
....and give them a Mexican flag to wave at us!
Give 'em all U.S. citizenship and they'll be so grateful for the President's compassion they'll immediately register as Republicans and tell all their amigos and familias that the GOP is the party of free handouts and compassion. In fact, do this for all 25 - 35 million of 'em and the Pubbies will never lose another election.
(yeah right)