President Barack Obama and his fellow Democrats sold many Americans on the Affordable Care Act largely by emphasizing two arguments: The law would help to reduce overall health-care costs, and it would provide health insurance to those who, for financial or health reasons, cannot get it now.

Unfortunately, both of these arguments are flawed. The law creates market distortions that will significantly raise premiums and costs for many Americans — including some middle- income families. And there are less costly, less distortionary and less intrusive ways to address the problem of the uninsured.