Over and over, Mr. Obama has imposed limits on his use of such powers but has not closed the door on them — a flexible approach premised on the idea that he and his successors could be trusted to use them prudently. Mr. Trump can now sweep away those limits and open the throttle on policies that Mr. Obama endorsed as lawful and legitimate for sparing use, like targeted killings in drone strikes and the use of indefinite detention and military tribunals for terrorism suspects.
And even in areas where Mr. Obama tried to terminate policies from the George W. Bush era — like torture and the detention of Americans and other people arrested on domestic soil as “enemy combatants” — his administration fought in court to prevent any ruling that the defunct practices had been illegal. The absence of a definitive repudiation could make it easier for Trump administration…
