The D Brief: SecDef’s OPSEC fail; Natsec team’s debate, revealed; SecNav confirmed; Counterterror efforts cut; And a bit more.

Pentagon chief Pete Hegseth shared war plans over an unclassified chat app, according to Jeffrey Goldberg, editor-in-chief of The Atlantic. Goldberg was added, apparently accidentally, to a Signal group chat used by the defense secretary, Vice President JD Vance, National Security Adviser Michael Waltz, and more than a dozen other principals and staffers to discuss the March 15 renewal of U.S. airstrikes targeting the Houthi terrorist group in Yemen.The chat’s veracity was confirmed by Nat