National security advisor Mike Waltz said he accepted “full responsibility” for a high-level Trump administration planning chat about strikes against Houthi rebels in Yemen being accidentally shared ...

Mike Waltz was fired as national security advisor after being caught using the encrypted messaging app Signal during a Cabinet meeting, despite prior warnings and a previous scandal involving a Signal ...

The following is the transcript of the interview with Mike Waltz, U.S. ambassador to the U.N., that aired on "Face the Nation ...