Isaacman Testifies Before House Appropriations CJS Subcommittee on NASA FY2027 Budget — Key Appropriations Step

NASA Administrator Jared Isaacman appeared before the House Appropriations Commerce, Justice, Science (CJS) Subcommittee at 3:30 PM ET on April 27 — the second major congressional oversight session in six days on the White House's proposed FY2027 NASA budget request. Unlike the April 22 authorization-focused House Science, Space, and Technology Committee hearing, the House Appropriations CJS Subcommittee controls the actual FY2027 funding bill and has direct authority to modify or restore the $18.8 billion request (a 23% overall cut from FY2026 enacted levels and a 47% reduction to the Science Mission Directorate). Isaacman again defended the proposal, citing Artemis II's April 1–10 crewed lunar flyby as justification for exploration-first prioritization: the mission returned four astronauts — Commander Reid Wiseman, Pilot Victor Glover, Mission Specialists Christina Koch and Jeremy Hansen — safely from humanity's first crewed journey beyond LEO since Apollo 17. Key concerns raised by subcommittee members included the proposed cancellation of the Nancy Grace Roman Space Telescope, severe cuts to Earth science satellite operations, potential discontinuation of Europa Clipper operations, and the broader science community opposition registered by the Planetary Society, American Astronomical Society, and universities. A companion Senate CJS Appropriations hearing is scheduled for April 28. Congress has historically softened the most severe proposed NASA cuts during the appropriations process. At Kennedy Space Center, the formal 30-day Orion heat shield inspection continues at the Multi-Payload Processing Facility, now in its third week — Marshall Space Flight Center X-ray scans and Avcoat sample extractions are underway, with results expected around May 10, 2026 that will define the Artemis IV crewed lunar landing timeline. Day 27 post-splashdown.