President Donald Trump declares threats to the U.S. power grid are a national emergency. The president bans the use of certain equipment for the power grid thats manufactured by a company under the control of a foreign adversary. The order doesnt name any countries or companies, but it notes that the term “foreign adversary” means “any foreign government or foreign non-government person engaged in a long-term pattern or serious instances of conduct significantly adverse to the national security of the United States or its allies””]