<P> Third parties in a two - party system can be: </P> <Ul> <Li> Built around a particular ideology or interest group </Li> <Li> Split off from one of the major parties or </Li> <Li> Focused on a charismatic individual . </Li> </Ul> <Li> Built around a particular ideology or interest group </Li> <Li> Split off from one of the major parties or </Li>

What factors account for the 2 party system