Obama’s successors will likely reverse him on social benefits for migrants just as Clinton’s successors reversed him on SCHIP. They might not even have to: The courts could make the decision for them even before the Obama administration ends. In the 1982 case of Plyler v. Doe, the Supreme Court ruled that illegal immigrants of school age must receive a K-12 education at full public expense. The court held that distinctions based upon immigration status, including illegality, should receive “intermediate” scrutiny, the same degree of scrutiny as distinctions based upon sex. By this time next year, immigrant advocates will be queuing at courtrooms across the nation to argue that the denial of a disability pension, of health coverage, of food stamps violates the standard set in Plyler.

The battle for benefits will be the first of the next amnesties, but not the last. Millions of illegal aliens will not benefit from this round of presidential amnesty. Their advocates in Congress and the White House are content to accept one slice of relief today. They reserve the right to return for more tomorrow. In its press release applauding Obama’s action, the National Council of La Raza cautioned: "We also note that this is just the beginning.” So it is. The Senate “Gang of Eight” bill from 2013 would have legalized 8 million. We’ll soon hear a lot more about the unamnestied 3 million.

And after them, will come new influxes of illegal immigration in the years to come. Obama insisted that his executive action will "not apply to anyone who might come to America illegally in the future.” Brave words, but the president’s deeds contradict them. Illegal immigration, like everything else, responds to incentives, both economic and legal. When the job market falters, as in 2008-2009, illegal immigration slows. When prospective illegal immigrants perceive that law enforcement has relaxed, they seize the apparently proffered opportunity. Suspension of enforcement in June 2012 against the so-called Dreamers—illegal aliens who had entered the country as children—was promptly followed by a surge of illegal immigration by 14- and 15-year-old border crossers.

Diana Yoo/Pew

Pew Research Center

Consider the new opportunity extended by the president. Those illegal immigrants who will be allowed to stay in the United States are those who had a child here and then remained undetected for five years or longer. What message does that send? Come while you can—and have a baby while here?

The president bravely insists that under his new order, "If you plan to enter the U.S. illegally, your chances of getting caught and sent back just went up.” But right now, your chance of getting caught is lower than at any time since the 1970s. Despite the label “deporter-in-chief” applied to him by immigration advocates, Obama has in fact deported aliens at the slowest rate of any president since Richard Nixon, according to the administration’s statistics, as reviewed by the Center for Immigration Studies: