Political podcasts are podcasts that focus on contemporary politics and current events. Most political podcasts maintain a connection with an existing media source such as a newspaper or magazine. They aim to inform or entertain or advocate a cause, usually for progressive causes, although there are some conservative podcasts. They are often cost-effective to produce, requiring minimal computer technology to operate. Their audiences are generally persons in interested in current events, and programs usually have a duration of a half hour to an hour.