Millions of Americans who rely on the Affordable Care Act for health insurance are bracing for skyrocketing premiums in 2026 after the failure of congressional Democrats’ efforts to extend federal subsidies, which drove the longest federal government shutdown in history. But New Mexicans with insurance through the ACA, also known as “Obamacare,” could be in large part spared — at least until June — from those soaring costs because the state is spending millions to backfill the federal subsidies.