A hacker breached TeleMessage, a government-approved messaging app used by Trump administration officials, exposing archived ...

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Mike Waltz, the national security adviser for President Donald Trump, is seen in photos using Signal during a Cabinet meeting ...

President Trump recently discouraged the use of the Signal app after controversy over a group chat of administration ...

The clone, TeleMessage, was the subject of a reported hack in which the contents of some direct messages and group chats were ...

A clone of the messaging app Signal, which was used by since-ousted national security advisor Mike Waltz, has been hacked.

Today, the Trump administration announced that national security advisor Mike Waltz would be leaving the White House after ...

The images, captured by Reuters, show Mike Waltz, the former national security adviser, using the TM SGNL app, which allows ...

The Trump loyalist faced scrutiny over a Signal chat he organized that mistakenly included The Atlantic journalist Jeffrey Goldberg.

White House national security adviser Mike Waltz is leaving the Trump administration just weeks after it was revealed he ...