Over at FiveThirtyEight, Ben Casselman has a good article on something I’ve also written about: the changing patterns of immigration. The debate on comprehensive immigration legislation, as he notes and I have noted, has remained much the same since bills came before the Senate in 2006 and 2007. But the facts have changed. Net migration from Mexico to the United States fell to zero between 2007 and 2012 (the latest year covered by data), according to the Pew Research Center. There are now more immigrants coming from Asia than from Latin America, contrary to the 1982-2007 period. There has been a decline, about 10 percent in magnitude, in the number of illegal immigrants living in the United States.

And of course in recent months we have seen a huge spike in underage illegal immigrants from Guatemala, Honduras and El Salvador.