National security adviser Mike Waltz is expected to step down as soon as Thursday in the first shake-up among the president’s top advisers. The development, reported first by CBS News, comes just over a month after Waltz faced a barrage of criticism for adding The Atlantic editor Jeffrey Goldberg to a group chat on Signal in which Cabinet officials discussed war plans for a strike in Yemen.

Mike Waltz has been a dead man walking for the past month, and the outgoing national security adviser started to act like it, Trump administration sources tell Axios. Why it matters: "Signalgate" badly damaged Waltz,