A political party is a group of people who come together to contest elections and hold power in the government. The party agrees on some proposed policies and programmes, with a view to promoting the collective good or furthering their supporters' interests.
While there is some international commonality in the way political parties are recognized, and in how they operate, there are often many differences, and some are significant. Many political parties have an ideological core, but some do not, and many represent very different ideologies than they did when first founded. In democracies , political parties are elected by the electorate to run a government. Many countries have numerous powerful political parties, such as Germany and India and some nations have one-party systems , such as China and Cuba. The United States is in practice a two-party system , with many smaller parties participating. Its two most powerful parties are the Democratic Party and the Republican Party.