For the argument, click through for an article at The Heritage Foundation. A quote:
The United States does not have a private-sector health insurance system, let alone a functioning competitive market for insurance or health services. In fact, the federal government has been the dominant force in American health care for decades, long before the recent massive expansion of the government’s role in the 2010 Patient Protection and Affordable Care Act (PPACA) [Obamacare]. Through overly restrictive policies, Medicare, Medicaid, and tax subsidies, the federal government has dominated the operation of the U.S. health care system for the past half-century. It is primarily federal policies that are responsible for driving up costs and making health insurance unaffordable for so many Americans.
You’ll read how Democrats helped deregulate the airline and trucking industries, leading to lower consumer costs.