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protesters and the tears of Senator Schumer. Secretary Kelly said that all is going well with very few problems. MAKE AMERICA SAFE AGAIN! — Donald J. Trump (@realDonaldTrump) January 30, 2017

Trump was defending an executive order issued two days earlier that sets new barriers to entry for people from seven mostly Islamic countries. Refugees, visa holders and permanent U.S. residents were all among those affected, at least initially. But White House aides sought to minimize the impact of the order Monday after allies from the U.K. to Germany condemned the move and major international companies said it threatened to strangle the free flow of workers and commerce.

The computer interruption at Delta didn’t begin until about 7 p.m. New York time on Sunday, more than 48 hours after Trump signed the executive order. While it grounded about 170 flights, it lasted less than three hours and didn’t affect international flights.

Trump compared his order to one issued by his predecessor, Barack Obama, and effectively told fellow Republicans who criticized him to mind their own business.

“This is not about religion — this is about terror and keeping our country safe,” Trump said in a statement Sunday pushing back against the international uproar that followed his action. “There are over 40 different countries worldwide that are majority Muslim that are not affected by this order.”

The fallout from the order was swift, compounded by the fact that few — including some of Trump’s own aides — seemed clear what was in it. Two of his top aides, strategist Steve Bannon and son-in-law Jared Kushner, had to get on the phone with British officials to walk them through it. Another Trump aide said the order added a new step to re-entry for some green-card holders. Yet another aide said the status of such permanent legal residents would be clarified later.