The terms party conference (UK English), political convention (US and Canadian English), and party congress usually refer to a general meeting of a political party. The conference is attended by certain delegates who represent the party membership. In most political parties, the party conference is the highest decision-making body of the organization, tasked with electing or nominating the party's leaders or leadership bodies, deciding party policy, and setting the party's platform and agendas.
The definitions of all of these terms vary greatly, depending on the country and situation in which they are used. The term conference or caucus may also refer to the organization of all party members as a whole. The term political convention may also refer to international bilateral or multilateral meetings on state-level, like the convention of the Anglo-Russian Entente (1907).
Within party conferences, there might be different offices or bodies fulfilling certain tasks, usually including:
In Canada, besides annual or biennial conventions, parties often hold special conventions to elect new leaders; often known as a leadership convention. The new leader of a party may then become prime minister.
All Irish parties have annual party conferences, called Ardfheis, at which party policy is decided by the membership and the party chairperson and executive board are elected.
In the United Kingdom the political conferences (usually called party congress, or party conference) generally take place in three weeks of September and October of each year, whilst the House of Commons is in recess. The conferences of the three largest UK-wide parties, the Conservative Party Conference, the Labour Party Conference and the Liberal Democrat Federal Conference, are held during this time.
In the United States, a political convention usually refers to a presidential nominating convention, but it can also refer to state, county, or congressional district nominating conventions in which candidates are nominated, delegates to larger regional or national conventions are elected and the party platform is adopted. Today, the two largest conventions on national level are the Democratic National Convention and the Republican National Convention, usually held every four years to select their candidates for the offices of president and vice president. They are attended by delegates, who are mostly elected in primaries.
Between the national conventions, the national committee of each party (see DNC and RNC) leads the party administratively, while they are politically represented by their leaders in Senate and in the House, or (if applicable) by the president. However, some party charters also provide for party conferences to be held between two national conventions to deal with various matters. In fact, those and the national committees can be compared to regular party conventions in other countries.
The first political convention held in America took place in Hartford, Connecticut in March 1766. The meeting was organized by the Sons of Liberty, who, in challenging incumbent governor Thomas Fitch, nominated William Pitkin for governor and Jonathan Trumbull for deputy governor.
Other than in the United States, party conferences in Germany (both on state and federal level), called Parteitag ("party diet"), will not only meet to nominate candidates for public elections, but also regularly (at least once a year) to adopt political resolutions, select party officials or to amend their statutes. Generally, the party organizations themselves and also their representatives (such as the chairperson, called party leader, and other board members) play a much more prominent role in German politics than they do for example in the US or UK, where the parties are mainly represented by their members and leaders in parliament or (if applicable) government.