Abstract
The rational choice theory made clear about the action that voters support parties. In that theory, however, voters are supposed to know each political position of all parties and they can calculate the political distance from them to all parties. In this paper, we assume that the voters cannot know each political position of all parties, but know only the political distance between the political output and their political position. We inspect that the voters' adaptive support controls the political output and they can lead to the best political position for them. In this simulation, two parties competing for votes each other. We show the availability of voters' adaptive support in the case that a party change suddenly its political position. As a result, we come to that voters can lead the political output to their favored position no matter that a party change suddenly its political position.