BOSTON — NASA administrator nominee Jared Isaacman says he would, if necessary, prioritize the Artemis lunar exploration campaign over human missions to Mars and calls a potential halving of NASA science funding not “an optimal outcome.”

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Jeff Foust writes about space policy, commercial space, and related topics for SpaceNews. He earned a Ph.D. in planetary sciences from the Massachusetts Institute of Technology and a bachelor’s degree with honors in geophysics and planetary science...