During the mid-1790s, citizens of the newly formed United States became embroiled in a divisive debate over a proposed commercial treaty with Great Britain. Long regarded as a pivotal event in the history of the early republic, the controversy pitted pro-treaty Federalists against anti-treaty Jeffersonian Republicans. Yet as Todd Estes argues in this perceptive study, the year-long debate over the ratification of the Jay Treaty represented more than a clash over foreign policy between two nascent political parties. It also marked a significant milestone in the role played by public opinion...