A political faction is a group of people with a common political purpose. More specifically, political faction denotes a subgroup of a political party, where the former may be distinguished by having one or more opinions or interests that differ from the latter's. Intra-party conflict between factions can lead to schism of the party into two or more political parties. The ley de lemas electoral system allows voters to indicate on the ballot their support for a specific faction of their preference within a political party. Political factions can represent voting blocs. Political factions require a weaker party discipline. Research indicates that factions can play an important role in moving their host party along the ideological spectrum.