WASHINGTON >> Top national security officials for President Donald Trump, including his defense secretary, texted war plans for upcoming military strikes in Yemen to a group chat in a secure messaging app that included the editor-in-chief for The Atlantic, the magazine reported in a story posted online Monday. The National Security Council said the text chain “appears to be authentic.”

Trump initially told reporters he was not aware that the highly sensitive information had been shared, 21/2 hours after it was reported. He later appeared to joke about the breach.

The material in the text chain “contained operational details of forthcoming strikes on Iran-backed Houthi-rebels in Yemen, including information about targets, weapons the U.S. would be deploying, and attack sequencing,” Atlantic editor-in-chief Jeffrey Goldberg reported.

It was not immediately clear if the specifics of the military operation were classified, but they often are and at the least are kept secure to protect service members and operational security. The U.S. has conducted airstrikes against the Houthis since the militant group began targeting commercial and military vessels in the Red Sea in November 2023.

Just two hours after Goldberg received the details of the attack on March 15, the U.S. began launching a series of airstrikes against Houthi targets in Yemen.Investigation begins

The National Security Council said in a statement that it was looking into how a journalist’s number was added to the chain in the Signal group chat. In addition to Defense Secretary Pete Hegseth, it included Vice President JD Vance, Secretary of State Marco Rubio and Tulsi Gabbard, Trump’s director of national intelligence.

Goldberg said he received the Signal invitation from Mike Waltz, Trump’s national security adviser, who was also in the group chat.

Hegseth in his first comments on the matter attacked Goldberg as “deceitful” and a “discredited so-called journalist” while alluding to previous critical reporting of Trump from the publication. He did not shed light on why Signal was being used to discuss the sensitive operation or how Goldberg ended up on the message chain.

“Nobody was texting war plans and that’s all I have to say about that,” Hegseth said in an exchange with reporters after landing in Hawaii on Monday as he makes his way to the Indo-Pacific on his first overseas travel as defense secretary.

In a statement late Monday, White House spokeswoman Karoline Leavitt said the president still has the “utmost confidence” in Waltz and the national security team.

Earlier Monday, Trump told reporters, “I don’t know anything about it. You’re telling me about it for the first time.” He added that The Atlantic was “not much of a magazine.”

By early evening, the president jokingly brushed it aside. He amplified a social media posting from Elon Musk spotlighting a conservative satirical news site article with the cutting headline: “4D Chess: Genius Trump Leaks War Plans to ‘The Atlantic’ Where No One Will Ever See Them.”

Government officials have used Signal for organizational correspondence, but it is not classified and can be hacked. Privacy and tech experts say the popular end-to-end encrypted messaging and voice call app is more secure than conventional texting.

Reaction immediate

The sharing of sensitive information comes as Hegseth’s office has just announced a crackdown on leaks of sensitive information, including the potential use of polygraphs on defense personnel to determine how reporters have received information.

Sean Parnell, a spokesman for Hegseth, did not respond to requests for comment on why the defense secretary posted war operational plans on an unclassified app.

The administration’s handling of the highly sensitive information was swiftly condemned by Democratic lawmakers. Senate Democratic leader Chuck Schumer called for a full investigation.

“This is one of the most stunning breaches of military intelligence I have read about in a very, very long time,” Schumer, a New York Democrat, said in a floor speech Monday afternoon.

“If true, this story represents one of the most egregious failures of operational security and common sense I have ever seen,” said Sen. Jack Reed of Rhode Island, the top Democrat on the Senate Armed Services Committee, in a statement.

He said American lives are “on the line. The carelessness shown by Trump’s Cabinet is stunning and dangerous. I will be seeking answers from the Administration immediately.”

Some Republicans also expressed concerns.

Sen. Roger Wicker, the Mississippi Republican who chairs the Senate Armed Services Committee, told reporters Monday, “We’re very concerned about it and we’ll be looking into it on a bipartisan basis.”

Reed said he would be speaking with Wicker about what the committee will do to “follow up” on the Signal leak.

Senate Majority Leader John Thune said he wants to learn more about what happened.

Republican House Speaker Mike Johnson offered a notably forgiving posture.

“I think it would be a terrible mistake for there to be adverse consequences on any of the people that were involved in that call,” Johnson said. “They were trying to do a good job, the mission was accomplished with precision.”

The handling of national defense information is strictly governed by law under the century-old Espionage Act, including provisions that make it a crime to remove such information from its “proper place of custody” even through an act of gross negligence.

Leak reveals internal debate

Vance, in the chain of the messages, questioned whether Americans would understand the importance of strikes that came with the risk of “a moderate to severe spike in oil prices” and if the timing of the operation might be a “mistake.”

“I am willing to support the consensus of the team and keep these concerns to myself,” Vance argued. “But there is a strong argument for delaying this a month, doing the messaging work on why this matters, seeing where the economy is, etc.”

Vance also made the case that Europe would benefit much more than the U.S. by the action aimed at decimating the Houthis and securing Red Sea shipping lanes.

“If you think we should do it let’s go. I just hate bailing Europe out again,” Vance said in a back-and-forth with Hegseth.

“I fully share your loathing of European free-loading. It’s PATHETIC,” Hegseth replied. He added, “I think we should go.”

The vice president’s communication’s director, William Martin, in a statement downplayed the debate. He said Vance “unequivocally supports this administration’s foreign policy.”

Airstrikes continue

U.S. airstrikes targeting Yemen’s Houthi rebels continued across the country into early Tuesday, with the group saying one attack in the capital killed at least two people and wounded more than a dozen others.

The American strikes on the rebels, who threaten maritime trade and Israel, entered their 10th day without any sign of stopping.

So far, the U.S. has not offered any specifics on the sites it is striking, though Waltz, the national security adviser, claimed the attacks have “taken out key Houthi leadership, including their head missileer.”