As if the process was already not complicated enough, several states have moved up their primaries or caucuses to have more influence on the outcome, with the possibility that a Republican nominee could emerge by mid-March, five months before the convention. In fact, observers believe that this jumble of early contests is a case of democracy gone awry and will give voters less opportunity to scrutinise candidates. As a result, 75 per cent of convention delegates will be chosen by March 26 when California, the largest state, holds its primary. Once the nominations are decided, the winners choose their own vice-presidential running mates. The parties, in recent tradition, have gone along with the choice.