Once again, efforts are being made to overhaul the US health care system. Democrats and Republicans have conflicting views on how to repair this ailing system. However, this is not a new phenomenon. Reformers have long struggled to form a universal health care system only to find themselves in conflict with groups whose financial stake is threatened as well as numerous labor associations who are concerned about a loss of power. This struggle is also caused by differences in ideologies. This article surveys social movements for national health insurance (NHI) that occurred in the United States and will examine features that prevented NHI policy formation.