The National Security Agency sent a bulletin in February warning of Russian hackers trying to access encrypted conversations on Signal.

After 'Signalgate,' the encrypted communication app is rocketing up the app charts—even as the Trump administration attempts to shift blame.

National security advisor Michael Waltz commented on the Signal text chain leak during an appearance on "The Ingraham Angle."

President Donald Trump said he is confident in his national security adviser, Mike Waltz -- a day after a report detailed how he inadvertently added a journalist to a Signal group chat discussing Yemen war plans. Trump told NBC News on Tuesday that Waltz "has learned a lesson and is a good man."

A story in The Atlantic detailed how Trump administration officials shared war plans in a group chat that included a journalist.

President Trump told reporters he does not believe national security adviser Mike Waltz should apologize for inadvertently adding a reporter to a Signal group chat.

President Trump expressed confidence in Mike Waltz and downplayed the incident, saying the situation was “the only glitch in two months, and it turned out to not be a serious one.”

Rep. Seth Moulton has criticized the Trump administration for its response to the use of Signal by high-level officials to discuss military plans, saying they have done nothing to prevent a repeat