Question: Which of the following statements is the BEST reason the United States has maintained a 2-party system? The Founding Fathers wanted to maintain a two-party system. Most people are happy with the two existing parties. 3rd parties are unconstitutional. Very few people register as Independents; therefore, they must vote for their designated party. People tend to vote for the party that is most likely to win, not necessarily the one the like the best.