A former chief of staff for the National Security Council says President Trump’s effort to revitalize U.S. manufacturing has major implications for national security. Alex Gray says although Americans may assume it’s given the U.S. has the industrial capacity it would need to fight a war that that it’s simply not so. Gray says the U.S. only rose to the challenge in WWII because it was able to retool an already a strong industrial base. One he says no longer exists but that President Trump is trying to rebuild.