The Affordable Care Act (ACA), also known as Obamacare, has provided healthcare coverage to nearly 50 million Americans since its launch, with over 18 million enrolling for the first time under the Biden administration. Data from the U.S. Department of the Treasury indicates that one in seven Americans has utilized ACA marketplaces, highlighting the law's significant impact on public health insurance access. Enrollment surged to a record 20.8 million in 2024, attributed to expanded premium tax credits and efforts stemming from the American Rescue Plan Act and Inflation Reduction Act. Public support for the ACA has grown, with over 60% viewing it favorably, despite ongoing opposition from Republicans. The ACA has become integral to the U.S. healthcare system, contributing to historic levels of insurance coverage and reducing average premiums by $800 per person annually. The law's resilience and increasing popularity reflect a pushback against prior attempts to repeal it, especially during the Trump administration, which saw a rise in the uninsured population.