On September 29, 2011, CAC released "CAC Supreme Court Preview:  Tests of Government Power in the Supreme Court’s 2011 Term—With Even Bigger Cases on the Horizon."  In this issue brief, CAC previews cases that challenge the federal government’s constitutional authority to act to protect against sex discrimination in the workplace, Coleman v. Maryland Court of Appeals, and to conduct surveillance using modern technology, United States v. Jones, as well as the states’ ability to take regulatory action that purportedly conflicts with federal law, for example, Douglas v. Independent Living Center. We note that the likely blockbusters of the Term are cases challenging the constitutionality of President Obama’s health care reform law, defending Arizona’s controversial immigration law, attacking affirmative action policies, and asserting the rights of same-sex adoptive parents. By June 2012, this term may prove to be among the most momentous terms in recent decades.