The Affordable Care Act becomes law in the United States.
The Affordable Care Act (ACA), often referred to as “Obamacare,” is a comprehensive healthcare reform law enacted in March 2010 with the primary goal of expanding health insurance coverage, improving healthcare quality, and reducing overall healthcare costs in the United States. One of its core features is the individual mandate, which initially required most Americans to have health insurance or pay a penalty—though this penalty was later reduced to zero at the federal level. The ACA also established health insurance marketplaces where individuals can compare and purchase plans, often with income-based subsidies to make coverage more affordable. It prohibits insurers from denying coverage due to preexisting conditions and allows young adults to stay on their parents’ insurance plans until age 26. Additionally, it expanded Medicaid eligibility in many states, though not all states adopted this expansion. Despite ongoing political debate, the ACA significantly reduced the uninsured rate and introduced essential health benefits that all plans must cover, marking a major shift in the U.S. healthcare landscape.