Democrats pledge probes into Musk and Miller’s actions as midterm backlash reshapes oversight and immigration policy. Democrats swept Congress and Texas despite Elon Musk's massive Republican spending. The victories could intensify scrutiny of his government role, contracts and businesses. Elon Musk spent nearly $474 million backing Republicans in the 2026 US midterms. After Democrats won Congress, he joked about space lasers and data centres.