A new letter from John Garamendi and Elizabeth Warren lands squarely in the middle of a long-running, uneasy debate over the future of the United States’ nuclear weapons infrastructure. Writing to Department of Energy Secretary Chris Wright, the two lawmakers are urging a serious reassessment of the plutonium pit production program, with a specific call to pause work at the Savannah River Site until clear guardrails are in place to prevent further waste of taxpayer money.