The Tea Party first attracted the media spotlight with Rick Santelli's televised rant against the government's bailout of mortgage borrowers on February 19, 2009, which instantly went viral as a video. As the authors document, however, "tea parties" associated with the Ron Paul movement had already been gathering momentum for more than a year. Beginning as a protest against government spending sprees, the Tea Party's sudden fame forced it to define itself on many issues where the membership was seriously divided. Fiscal conservatives, who were usually liberal on social issues, battled social...