It is now four years since the Affordable Care Act was enacted. And in more than 30 years in government, I've never seen a law get so little recognition for doing so much good so quickly. The right measure of the ACA isn't whether it avoids political controversy; it's whether it makes America better by achieving its five most fundamental goals: expanding health-insurance coverage, lowering costs and promoting fiscal responsibility, increasing quality through innovation, protecting seniors and delivering peace of mind to American families by guaranteeing essential rights in dealing with insurance companies.