Journalist Jeffrey Goldberg is accusing Mike Waltz of lying about talking with him — ridiculing on Sunday the claim that his phone number was mysteriously “sucked into” the national security adviser’s cellphone before being included in a Signal group chat about Yemen airstrikes.

Mr. Goldberg, who was included on a private text thread discussing war plans, was a longtime national security reporter who became editor of The Atlantic in 2016.

The administration has downplayed the importance of the text messages inadvertently sent to The Atlantic’s editor in chief.

The Pentagon's Inspector General's office announced on Thursday it was opening a probe into Defense Secretary Pete Hegseth's use of an unclassified commercial texting application to coordinate on the highly sensitive March 15 launch of U.

The Pentagon's inspector general launched a probe into the Trump administration's use of Signal to discuss a planned strike on the Houthis in Yemen.