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Ha an extensive section on congress and the electorate
Oxford Handbooks
These handbooks include scholarly reviews on the state of research in many disciplines, including political science. Below are a few key ones covering American politics.
Scholarly reviews across a broad range of topics. Choose Political Science and search within these volumes for topics related to elections e.g. political polarization and media, etc.
Since 1932, Annual Reviews has offered comprehensive, timely collections of critical reviews written by leading scientists. Annual Reviews volumes are published each year for 29 focused disciplines within the Biomedical, Physical, and Social Sciences.