Update:
Well, this just happened:

National Security Advisor Mike Waltz is out, along with his deputy, Alex Wong and other staffers.
Waltz, a former congressman and Green Beret, was the one who claimed responsibility for adding Atlantic Editor-in-Chief Jeffrey Goldberg to a Signal group chat back in March which discussed strikes against terrorists in Yemen.
And just like that, Waltz has been reassigned to U.S. Ambassador to the United Nations.
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