Mika Brzezinski introduced this as "the big story of the day." "The U.S. is ramping up digital attacks on Russia's power grid in an effort to deter future cyber activity. It was conducted under new cyber authorities, citing current and former government officials. Two administration officials tell the paper they believed Trump had not been briefed in any detail about the operation, while Pentagon and intelligence officials, quote, described broad hesitation to go into detail with the president about operations against Russia for concern over his reaction.