What boggles the mind is that Scalia thought it proper to jump into this political argument. And when he went on to a broader denunciation of federal policies, he sounded just like an Arizona Senate candidate…

As it happens, Obama has stepped up immigration enforcement. But if the 76-year-old justice wants to dispute this, he is perfectly free as a citizen to join the political fray and take on the president. But he cannot be a blatantly political actor and a justice at the same time.

Unaccountable power can lead to arrogance. That’s why justices typically feel bound by rules and conventions that Scalia seems to take joy in ignoring. Recall a 2004 incident. Three weeks after the Supreme Court announced it would hear a case over whether the White House needed to turn over documents from an energy task force that Dick Cheney had headed, Scalia went off on Air Force Two for a duck-hunting trip with the vice president.

Scalia scoffed at the idea that he should recuse himself.