On 13 March, Donald Trump’s national security adviser, Michael Waltz, who was the policy director for two secretaries of defense and was a member of the House intelligence committee, sent a message on the commercial Signal app: “Team – establishing a principles group for coordination on Houthis, particularly for over the next 72 hours.” “The Houthis PC small group” would oversee a US air attack on the Houthis in Yemen.
Despite Waltz’s extensive professional background, he misspelled “principals” as “principles” – perhaps an ordinary typo, but symptomatic of the shambles to come. Although the secretaries of defense, state and treasury, the director of national intelligence, the CIA director, the vice-president, and the president’s chief of staff were among the 18 people included, neither the chair of the joint chiefs of staff, who is a statutory member of the principals committee of the National Security Council, nor any military designee was invited into this group. Instead, the editor of the Atlantic, Jeffrey Goldberg, was sent a link. Waltz noted: “Joint Staff is sending this am a more specific sequence of events in the coming days.”