Waltz is a former Green Beret and Florida representative who resigned from Congress to join the Trump administration. He served as national security adviser for roughly three months. Trump reshuffled his team and named Secretary of State Marco Rubio acting national security adviser on May 1.

Senators questioned ex-Trump national security adviser Michael Waltz at confirmation hearing about a Signal chat that contained sensitive information.

The United Nations needs reform and the United States must have a strong voice to counter China, Mike Waltz, U.S. President Donald Trump's pick to be his U.N. envoy, said on Tuesday, adding that he is "confident we can make the U.

Months after the chat was disclosed, questions remain over the controversy, including if federal laws were violated and if classified information was exposed on the commercial messaging app.

Welcome to The Hill’s Defense & NatSec newsletter{beacon} Defense &National Security Defense &National Security   The Big Story Waltz emerges largely unscathed

Former National Security Advisor Mike Waltz faced scrutiny over a Signal chat incident during his U.N. ambassador hearing before the Senate Foreign Relations Committee.

Senate Democrats laid into Mike Waltz over his role in the Signalgate scandal during his confirmation hearing on Tuesday. Waltz, Trump’s former national security adviser, came in for a grilling from lawmakers as he’s seeking confirmation as the new U.