S ince the 1970s, Latino politics research has evolved, alternately responding to real-world political events and demographic changes, embracing new and emerging trends in the broader discipline, and offering new insights of its own that contribute to the development of political science. In so doing, there have emerged both an intellectual foundation and a growing body of empirical results, each of which challenges long-held theories and findings in the discipline more broadly. Thus, Latino politics research is central in refining and broadening our understanding of American politics. Immigration, social marginality, and their uncertain status as a racial or ethnic minority make this population unique and raise important obstacles in applying existing interpretations and orthodoxies from the discipline's other traditions to this emerging and rapidly growing segment of American society. The major contributions of this line of inquiry are identified in five key areas: pluralism, group identity and mobilization, political participation, institutions and representation, and assimilation. We conclude with some thoughts regarding how the evolution of American society and its Latino population will pose important questions for future generations of political scientists.