For 18 months, lower federal courts have winked and nodded at a dubious, dilatory lawsuit intended to block President Trump’s proclamation banning travel to the U.S. from a handful of countries that have massive internal problems with Islamic terrorism.

It took a Supreme Court ruling, unfortunately a narrow 5-4 ruling along partisan lines, to reaffirm what should have been obvious to everyone from the beginning: presidential powers are presidential powers, no matter who is president.