linguistic:paraphrasing
Party membership

Citizens in a democracy will often affiliate with a specific political party. Party membership may include paying dues, an agreement not to affiliate with multiple parties at the same time, and sometimes a statement of agreement with the party's policies and platform. In democratic countries, members of political parties often are allowed to participate in elections to choose the party leadership. Party members may form the base of the volunteer activists and donors who support political parties during campaigns. The extent of participation in party organizations can be affected by a country's political institutions, with certain electoral systems and party systems encouraging higher party membership. Since at least the 1980s, membership in large traditional party organizations has been steadily declining across a number of countries, particularly longstanding European democracies.