Mike Waltz, a possible victim of Signal Gate

Politico added: “Nothing has been finalized yet, and White House officials warned that Trump will make a decision in the next day or two, depending on how the scandal is covered.”

A senior US administration official told Politico on Monday afternoon that they are in contact with other administration staff about how to deal with White House national security adviser Mike Waltz.

The senior official added: “Half the White House staff says he didn’t last or shouldn’t last. Two senior White House aides have floated the idea that Waltz should resign to prevent the president from being put in an “unfavorable position.”

He continued: “Not checking who should be on this chat and his presence on Signal Messenger was reckless. The national security adviser should not be reckless.”

According to Politico, a person closes to the White House also said bluntly: “Everyone in the White House agrees on one thing: ‘Mike Waltz is an idiot.’”

The Politico report continued: The Atlantic editor received a request from Mike Waltz to join the encrypted messaging app Signal on March 11. He was then added to a group chat about the attack on Yemen.

Other senior administration officials, including Defense Secretary Pete Hexath, Vice President J.D. Vance and Director of National Intelligence Tulsi Gabbard, were also apparently in the group.

Politico also wrote, citing a third source familiar with the matter, that Trump has spoken to Waltz about the matter and that the White House is currently supporting him.

However, the official said that Waltz's fate largely depends on Trump's personal feelings about the matter, while other administration officials were also present in the chat.

Jeffrey Goldberg, editor of The Atlantic, had previously announced that the Trump Administration’s National Security Council mistakenly added him to a confidential Signal chat group and shared information with him about airstrikes on Yemeni Ansar Allah positions.

He admitted: "I could not believe that the president's national security adviser would be so reckless as to inform me of such matters that senior US officials, including the vice president, have access to."

Goldberg said he doubted the chain of messages was a “disinformation” but that the content appeared to be genuine and some details were even accurate, such as a message on J.D. Vance’s account stating that he would be absent from the meeting (the White House committee meeting) due to attending an economic event in Michigan, which was indeed true.

Goldberg, who followed the conversation on the messaging app Signal, wrote: “I’m amazed that no one in the group noticed my presence.”