If you are interested in keeping up with the numerous lawsuits that challenge the constitutionality of Obamacare, check out Health Care Lawsuits.  Another good resource is the “aca litigation blog” that says it is “a place to find news updates, legal analysis, and all official documents related to the states’ constitutional challenges to the Patient Protection and Affordable Care Act (as amended by the Health Care and Education Reconciliation Act of 2010).