Gauging the effectiveness with which the challenge of the Five Star Movement (M5S) has been met by other parties, especially the Democratic Party (PD), is essential to understanding the evolution of both the M5S itself and the party system. In the case of the PD, the first strategy—attempting to co-opt the M5S—was partially successful in that its overtures to the M5S opened up significant internal divisions in Beppe Grillo's party. The second strategy—competing for votes—was more successful thanks to the superiority of the PD's organization on the ground. The third—diminishing the challenger's political resources—met with mixed success. The events surrounding the 2 October confidence motion and the election of Matteo Renzi as prime minister suggest that the fourth strategy—reinforcement of the party's own political resources—was deployed to good effect. The overall result was to contain the M5S's growth but leave the future uncertain.