Former Secretary of State and one-time Democratic presidential nominee Hillary Clinton blasted the Trump administration's Signal app leak as "dangerous" and "just dumb" in a New York Times opinion piece published Friday.

"In a dangerous and complex world, it’s not enough to be strong. You must also be smart," Clinton wrote in her op-ed on top-level Trump officials' decision to use the encrypted messaging platform to discuss sensitive military details for an airstrike on Houthi rebels in Yemen.

"This is the latest in a string of self-inflicted wounds by the new administration that are squandering America’s strength and threatening our national security," Clinton wrote. "If this continues, a group chat foul will be the least of our concerns, and all the fist and flag emojis in the world won’t save us."

Jeffrey Goldberg, editor in chief of The Atlantic and former foreign........

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