The Supreme Court is considering fine questions of administrative law in Department of Homeland Security v. Regents of the University of California, but underlying the case are some much bigger questions which Congress and the Trump administration need to answer well.

We think President Barack Obama exceeded his executive authority in issuing his Deferred Action for Childhood Arrivals, or DACA. We also believe the Trump administration was within its rights to roll it back. But again, those are issues of secondary importance.