Having basically only two parties (Democrat and Republic) in the Congress make them hard to be consistency, thus they caused dysfunctional congress. Since they are like two extremes- one is more liberal and one is more conservative, it is not likely for them to have one hundred percent agreement on them same issues, and their unwillingness to compromise makes it even harder to pass laws. Instead of really serving for the people, the two parties seem to care about more the competition going on and on between them. Either of them would not give up or change their opinions for their mutual goal of getting laws ratified.
There already is and always has been more than two political parties within the United States. One could argue that the others have no congressional representation but you would be wrong about that as well. There were at least 5 different parties offering 2012 presidential election candidates. Your argument that we should change the two party system in a falsity as we do not have a two party system.
Yes there are more than two political parties in the US indeed. However, each year it ends up either a Democrat or a Republic winning the election, and the two parties are the main power. Since the other parties play insignificant roles in the congress, we just called it a two-party system. My point is the two party system is becoming a obstacle for Congress to get things done because their opinions are too split up. A multi-party system will make sure that more political voices can be heard, and it can also creates a healthy competition, which can make less useless bickering between two parties.
The people serving in congress are elected. If you have a problem with party affiliation then your problem is with democracy. and your claim that the other parties are insignificant are purely opinion. In my opinion Ron Paul has significant support and so does the "Tea Party".