Health care has been a hotly debated topic for the past decades in the United States. It is only natural that health care has such a great importance, because every person eventually will be in need of health care facilities or services in their lives. The current President of the United States, Mr. Barack Obama, acknowledged this importance by establishing the Patient Protection and Affordable Care Act of 2010. This Act, commonly known as ObamaCare, represents the most important health care overhaul in recent history. First, this thesis provides an overview of the United States judicial system. This is essential for the understanding of the importance of ObamaCare. As soon as the reader sees how difficult the path of passing a bill is, it becomes obvious how necessary health care reform has become to the United States. The Patient Protection and Affordable Care Act of 2010 changed and will change lives in the United States of America. Second, this thesis displays what these changes exactly are: what it means for individuals, for companies, or for children and the elderly. It will also reflect on the reactions among people who experience the changes; they range from opposing to supporting opinions.Third, an investigation for the reasons of opposition against ObamaCare is carried out in this thesis as well. The reasons are manifold: three reasons, i.e. costs, limitation of freedom, and the death panel rumor, are discussed.At last, the current legal struggles of ObamaCare as a law are explained. Court cases against ObamaCare which were filed in to the Courts of Appeals as well as to the highest court in the nation, The United States Supreme Court, are explained. The decision of The United States Supreme Court will have a tremendous influence not only on people?s lives, but also on the presidential election in 2012.