Hundreds of U.S. space-sector companies are urging Congress to reverse the White House’s plan to eliminate most funding for the Commerce Department’s Traffic Coordination System for Space, or TraCSS. In letters dated 7 July and seen by Bloomberg, seven industry associations representing roughly 450 firms warned that an 84 percent cut—to US$10 million—in the fiscal-2026 budget would effectively shut the programme and increase the risk of satellite collisions. TraCSS, overseen by the National Oceanic and Atmospheric Administration’s Office of Space Commerce, is being developed as a civilian counterpart to the Pentagon’s Space-Track database. The system is intended to provide free, real-time warnings to operators of the roughly 12,000 active satellites and large amounts of orbital debris, a service industry executives say is critical as mega-constellations such as SpaceX’s Starlink proliferate. Industry leaders argue that shifting space-traffic management back to the Department of Defense would undermine national security, raise operating costs and cede international leadership to Europe and China, both of which are building their own systems. Signatories—including SpaceX and Amazon’s Kuiper unit—said the cut could even push U.S. companies to relocate overseas. Congressional appropriators will begin marking up the Commerce-Justice-Science spending bills this week, with the Senate Appropriations Committee scheduled to meet on 10 July. Lobbyists involved in the effort say partial funding below the US$65 million appropriated for fiscal 2025 would delay TraCSS’s planned full rollout early next year and jeopardise contracts with private data providers.