Why shouldn’t US immigration law be good for the US?

The immigration reform bill that Sens. Tom Cotton and David Perdue introduced Wednesday — the RAISE Act — won’t become law anytime soon. But it’s a milestone that’s going to change the way we think about immigration, and will be the biggest issue in 2018 and 2020.

There are two simple principles behind the bill. We’re going to admit people on the basis that they’ll make Americans better off. And amnesty is off the table.