National security adviser Mike Waltz takes 'full responsibility' for putting together text group that leaked military plans

What to know today

• Democrats on the Senate Intelligence Committee grilled CIA Director John Ratcliffe and National Intelligence Director Tulsi Gabbard over a group chat about military plans to which a veteran journalist was inadvertently added.
• In an exclusive interview with NBC News, President Donald Trump said he is standing by national security adviser Mike Waltz, whose team Trump said was responsible for adding The Atlantic magazine's editor-in-chief to the chat. He later told reporters in the Oval Office that aides "probably" won't use the Signal messaging app anymore.
• Waltz said tonight that he takes "full responsibility" for putting together the text group that included journalist Jeffrey Goldberg.
• Trump's nominee to head the Social Security Administration, Frank Bisignano, testified at his Senate confirmation hearing, where he faced questions about cuts to the agency and talk of privatization.