Ten years on, the legacy of Citizens United still threatens representative democracy in the United States

Ten years ago today the US Supreme Court decided that corporations were effectively citizens, and able to spend as much as they wanted to on political campaigns independent of candidates. William C.R. Horncastle explains the history of campaign finance which led to the seminal Citizens United ruling in 2010, and how the decision has since led to a massive influx of often anonymous campaign spending by outside groups.