McCloskey’s original text remains unchanged. In his historical interpretation, he argues that the strength of the Court has always been its sensitivity to the changing political scene, as well as its reluctance to stray too far from the main currents of public sentiment. In this new edition, Sanford Levinson extends McCloskey’s magisterial treatment to address developments since the 2010 election, including the Supreme Court’s decisions regarding the Defense of Marriage Act, the Affordable Care Act, and gay marriage.