The foundations of American national security are under assault. The battle lines are drawn. On one side stand the Federal Bureau of Investigation, the Central Intelligence Agency, the National Security Agency. On the other: the commander-in-chief of the United States.

Donald Trump’s appalling performance in Helsinki was a subversive act. He rejected the conclusion of American intelligence that his election was aided by a hydra-headed act of political warfare controlled by the Kremlin. He did so with a wink and a smile for the smirking autocrat who led the attack.

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