““I think we are making a mistake,” Vance wrote in the Signal chat, later published by The Atlantic. Vance argued that although Trump wanted to send a message with the strikes, “I am not sure the president is aware how inconsistent this is with his message on Europe right now.” He did say, though, that he was “willing to support the consensus of the team and keep these concerns to myself,” but went on to say “there is a strong argument for delaying this a month.”
Minutes later, White House deputy chief of staff Stephen Miller shut down the conversation, writing, “As I heard it, the president was clear.””
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“The senior Republican official added: “It’s one thing to have a healthy interagency debate before a decision is made. It’s another to try and undo a Commander-in-Chief decision once Trump gives the execute order. This is the latter, and it’s very [John] Bolton-esque.”
Some Republicans believe Vance raising questions about an action the president had already agreed to amounted to a form of obstruction, the same senior Republican official said.”