" The primary elections are the cornerstones of the plebiscitary presidency. They strip away the veneer of party unity and expose the individuality of each candidate. As contemporary selection procedures force party leaders to compete with one another in the open, they prompt them to differentiate themselves publicly and to boast of their independence of mind. Pitting potential party spokespersons against one another in public combat, these procedures undercut the credibility of the candidate's affiliation with anything other than him- or herself. "

― , The Politics Presidents Make: Leadership from John Adams to Bill Clinton