as two-party systems but they are usually referred to as multi-party systems or a two-party plus system. There is not always a sharp boundary between a two-party system and a multi-party system. Generally, a two-party system becomes a dichotomous division of the political spectrum with an ostensibly left-wing and right-wing party: the Democratic Party versus the Republican Party in the United States, the Labor Party versus the Liberal–National Coalition bloc in Australia, the Labour Party versus the Conservative Party in the United Kingdom, and the Labour Party versus the Nationalist Party in Malta. Other parties in these countries may have seen candidates elected to local or subnational office, however. In some governments, certain chambers may resemble a two-party system and others a multi-party system. For example, the politics of Australia are largely two-party (the Liberal/National Coalition is often considered a single party at a national level due to their long-standing alliance in forming governments; they also rarely compete for the same seats for the Australian House of Representatives, which is elected by instant-runoff voting, known within Australia as preferential voting. However, third parties are more common in the Australian Senate, which uses a proportional voting system more amenable to minor parties. In Canada, there is a multiparty system at the federal and provincial levels; however, some provinces have effectively become two-party systems in which only two parties regularly get members elected, while smaller parties largely fail to secure electoral representation, and two of the three territories are run under a non-partisan consensus government model rather than through a political party system. The provincial legislative assemblies of Alberta and Saskatchewan currently have only two parties; two-party representation has also historically been common in the legislative assemblies of British Columbia, New Brunswick and Prince Edward Island, although all did elect some third-party members in their most recent provincial elections. The Commonwealth Caribbean while inheriting their basic political system from Great Britain have become two-party systems. The politics of Jamaica are between the People's National Party and the Jamaica Labour Party. The politics of Guyana are between the People's Progressive Party and APNU which is actually a coalition of smaller parties. The politics of Trinidad and Tobago are between the People's National Movement and the United National Congress. The Politics of Belize are between the United Democratic Party and the People's United Party. The Politics of the Bahamas are between the Progressive Liberal