Makes you wonder if Trump picked that precise seven on purpose. :)
He did because Obama and his intel and DHS had advised him to appear to act against those 7 countries.
Those of us who use/read the Whitehouse.gov with President Trump knew something had been set up as Trump’s ExO didn’t mention the 7 countries. They referenced the previous action of Obama, his intel people and DHS. So the blowback goes back to them.