This chapter treats the process of recruitment and selection as an independent variable to explain legislative behavior and its impact on the political regime. It examines the different types of candidates (the party leader, constituency politician, and party worker) that emerge from the recruitment and selection process and their relationship to the political party. These candidates exhibit two types of legislative behavior: party adherents and constituency politicians. The former enter politics to serve the interests of their political party and are loyal supporters of party policies. However, the latter type of legislator exhibits the characteristics that are valued by political parties for the purposes of winning elections—local influence and financial capacity. Yet these legislators are not beholden to the political party for re-election and prove to be unreliable allies to party leadership.