Waltz inadvertently added The Atlantic's editor-in-chief to a group thread discussing sensitive national security matters.

President Donald Trump's National Security Advisor Mike Waltz and other staffers are out at the National Security Council, ...

President Donald Trump announced his choice to serve as ambassador to the U.N. after Rep. Elise Stefanik withdrew her ...

US National Security Advisor Michael Waltz is leaving his post, a stunning fall for one of President Donald Trump’s top aides ...

President Donald Trump says he is nominating national security adviser Mike Waltz as United Nations ambassador while ...

President Donald Trump’s national security advisor, Michael Waltz, and one of his top deputies are stepping down, according ...

Trump announced the moves shortly after news broke that Mike Waltz and his deputy Alex Wong were leaving the administration.

National Security Advisor Mike Waltz is expected to leave his post in the Trump administration on the heels of controversy ...

Waltz had faced criticism for mistakenly adding a journalist to a chat group where sensitive military plans were discussed.

The president says Waltz, who started the leaked Signal chat, will be nominated as US ambassador to the UN and be temporarily ...