Any party that has less support than one of the major political parties in the United States is known as a minor party.
major parties
The two major US political parties are the Democratic Party and the Republican Party.
The Democratic-Republican Party
Republican and Democrat are the two major political parties in the American two-party system. However, there are other fringe parties like the Green party or the Libertarian party that often nominate candidates for election.
In a two-party system such as that in the United States, this is referred to as a "third party".
minor party
The two major political parties in Canada are the Conservative Party of Canada and the New Democratic Party. The other main political parties in Canada are the Liberal Party of Canada, Bloc Quebecois, and the Green Party of Canada.
The two major political parties are the Republican Party and the Democratic Party.
Italy's major political parties are:Italian Popular Party,Forza Italia,Northern League,Democratic Party Of The Left.
major parties
All of the major UK political parties support a constitutional monarchy.
Democratic, Republican, Green Party, Libertarian Party, Constitution Party
The two major Australian political parties are the Liberal Party of Australia and the Australian Labor Party.
The two major US political parties are the Democratic Party and the Republican Party.
splinter party
Labor Party Liberal Party
In the United States, a political party that is not one of the two major parties is referred to as a third party.