Abstract
Research suggests that endorsements should affect outcomes in low-information elections such as primaries, but that hypothesis has not yet been tested empirically. Based on a survey of 2002 congressional campaigns, this article describes the universe of individuals and groups that offer endorsements to primary candidates and analyzes their effects on primary election results. It finds that a primary candidate’s share of the partisan endorsements issued in the race significantly affects the candidate’s vote share, even controlling for campaign funds and candidate quality. Implications for theories of candidate emergence and success are discussed.
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