The House is set to vote next week on what some Republicans are proudly calling “the toughest border security bill ever.” But once the roll is called and the measure is passed, then what? Not yet a month into the 114th Congress, Republican leaders’ plans to advance border security legislation are sparking some speculation this could be the first installment in the GOP’s long-promised “piecemeal” approach to fixing the immigration system. Just what Speaker John A. Boehner, R-Ohio, and his allies have in mind could have some effect on what sort of support the pending bill receives. The bill, sponsored...