<P> Besides the Constitution, Green, and Libertarian parties, there are many other political parties that receive only minimal support and only appear on the ballot in one or a few states . </P> <P> Some political candidates, and many voters, choose not to identify with a particular political party . In some states, independents are not allowed to vote in primary elections, but in others, they can vote in any primary election of their choice . Although the term "independent" often is used as a synonym for "moderate," "centrist," or "swing voter," to refer to a politician or voter who holds views that incorporate facets of both liberal and conservative ideologies, an independent can be of any ideological or political persuasion . </P> <P> The United States Constitution is silent on the subject of political parties . The Founding Fathers did not originally intend for American politics to be partisan . In Federalist Papers No. 9 and No. 10, Alexander Hamilton and James Madison, respectively, wrote specifically about the dangers of domestic political factions . In addition, the first President of the United States, George Washington, was not a member of any political party at the time of his election or throughout his tenure as president . Furthermore, he hoped that political parties would not be formed, fearing conflict and stagnation, as outlined in his Farewell Address . </P> <P> Nevertheless, the beginnings of the American two - party system emerged from his immediate circle of advisers . Hamilton and Madison, who wrote the aforementioned Federalist Papers against political factions, ended up being the core leaders in this emerging party system . It was the split camps of Federalists, given rise with Hamilton as a leader, and Democratic - Republicans, with Madison and Thomas Jefferson at the helm of this political faction, that created the environment in which partisanship, once distasteful, came to being . </P>

In the modern us political system what is the main system