Despite Sen. Bob Corker’s (R-Tenn.) insistence that the congressional hearing on Tuesday about the authority to use nuclear weapons “is not specific to anybody,” it is the first hearing on this topic in decades, and comes at a time when U.S. President Donald Trump seems to have made a sport out of taunting North Korea’s leader as his nation advances its nuclear abilities.

Even before Trump took office and started threatening North Korea with “fire and fury,” the Pentagon had developed a $1.7 trillion plan under Barack Obama “to build a new generation of nuclear-armed bombers, submarines, and missiles, as well as new generations of warheads to go with them”—even though, as William Hartung describes in an excerpt from his new book about nuclear weapons, “in every sense of the term, the U.S. nuclear arsenal already represents overkill on an almost unimaginable scale.” 

Trump’s behavior throughout his campaign and presidency has heightened concerns about the threat of nuclear annihilation and has, for months, provoked global demands that the U.S. Congress strip Trump of his nuclear authority. “A tough-guy attitude on nuclear weapons, when combined with an apparent ignorance about their world-ending potential,” writes Hartung, “adds up to a toxic brew.” 

Thus, advocates of nuclear disarmament welcomed the decision by Corker, chairman of the Senate Foreign Relations Committee, to hold the first nuclear authority hearing since 1976. Several groups and individuals offered real-time analyses and critiques of the testimonies, tweeting with the hashtag #NoRedButton.

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