But Can It Work?

The House's immigration bill is well intentioned—and far from foolproof

Rarely has so important a bill come so far amid so much confusion. Supporters and opponents alike have only fuzzy ideas of how—or whether—it can be made to work, how much it might cost, even how many people it might directly help or hurt. (It would have at least some minor effect on almost everybody who looks for work or pays taxes.) Republicans and Democrats, conservatives and liberals, business organizations and union leaders have lined up on both sides. Amendments have switched the AFL-CIO...