Courts exercise discretion all the time when mitigating circumstances call for it, as do presidents, governors and other executives. Exceptions don't need to be written into every statute because it's understood that such discretion is a part of our system.

Yes, DACA litigation was rendered moot yesterday, which means that its constitutionality will remain unsettled. But set that aside for a moment. What do you believe the right thing -- the Christian thing -- to do is regarding these young people who have only known the U.S. and are, in all but legal status, Americans? Do you believe they should be deported? Say plainly, yes or no.