9: Political Parties Last updated Save as PDF Page ID 153708 OpenStax OpenStax 9.1: Introduction 9.2: What Are Parties and How Did They Form? 9.3: The Two-Party System 9.4: The Shape of Modern Political Parties 9.5: Divided Government and Partisan Polarization 9.6: Key Terms 9.7: Summary 9.8: Review Questions 9.9: Critical Thinking Questions 9.10: Suggestions for Further Study 9.11: References