Abstract: | This study explores the process by which party leaders build winning coalitions. Focusing on House passage of impoundment legislation in the 93rd Congress, the essay documents the extensive efforts of Democratic leaders to create a viable bill and persuade party members to support it. Analyses of whip counts demonstrate that the leaders passed the impoundment bill in part because they could bargain with and convert “successful” party members whose past career advancement and future achievements depended in part on leadership assistance. The essay concludes by identifying six conditions that nurtured the bargaining capacity of the Democratic leaders and fostered their coalition-building success.1 |