President Donald Trump takes questions from reporters after signing a series of executive orders. NBC News Homeland Security Correspondent Julia Ainsley, NBC News Senior White House Correspondent Gabe ...

Chinese hackers are burrowing into the networks of major critical U.S. infrastructure, including energy grids, water ...

Donald Trump is downplaying the potential threat that TikTok poses to national security -- but numerous aides and allies are squarely at odds with the president.