KFF Health News May 2 2025 Faced with potential federal spending cuts that threaten health coverage and falling childhood vaccination rates, Monica Soni, the chief medical officer of Covered California, has a lot on her plate — and on her mind. California's Affordable Care Act health insurance exchange covers nearly 2 million residents and 89% of them receive federal subsidies that reduce their premiums. Many middle-income households got subsidies for the first time after Congress expanded them