by Trump to Mattis to give advice on how to IMPLEMENT that ban, that seems to be what Mattis was saying.......DUHHHHH
"Once the panel reports its recommendations and following my consultation with the secretary of Homeland Security, I will provide my advice to the president concerning implementation of his policy direction," Mattis said.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic