We consider a model of political competition among two ideological parties who are uncertain about the distribution of voters. The distinguishing feature of the model is that parties can delegate electoral decisions to candidates by nomination. It is shown that if the credible platform...

We develop a model of endogenous party platform formation in a multidimensional policy space. Party platforms depend on the composition of the parties’ primary electorate. The overall social outcome is taken to be a weighted average of party platforms and individuals vote strategically....