It is primarily, but not exclusively, studied by researchers in the United States.
[5] It also consists of other major sub-fields, such as American political development (APD), which do not fit neatly into either category.
Research areas within the American political behavior sub-field include voting behavior, public opinion, partisanship, and the politics of race, gender, and ethnicity.
[6] Questions within the study of American political institutions include the legislative behavior and United States Congress, the presidency, courts and the legal process, bureaucracy, public law, state and local politics, and foreign policy.
[6] Scholars in American political development focus on determining how American politics has changed over time and what factors (institutional and behavioral) led to these changes.