Secretary of State Marco Rubio on Wednesday said “someone made a big mistake” in adding the editor in chief of The Atlantic into a group chat with the Trump administration’s top national security officials discussing an attack plan on the Houthis in Yemen.

The Atlantic's Jeffrey Goldberg reported that national security adviser Mike Waltz added him to the group chat on the commercial messaging app Signal. Waltz has taken "full responsibility" for creating the group chat,........

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