A Super PAC, more formally known as an independent expenditure-only committee, is a new form of political action committee. Unlike a traditional PAC, Super PACs can accept direct donations from corporations and unions; both types of packs can accept direct contributions from individuals. There are two other key differences between Super PACs and PACs. First, Super PACs can not directly contribute their funding to a political campaign, traditional political action committees can. Instead, all of the money raised is spent independent of supporting a candidate or political party, hence its name. Second, there is no limit to how much a Super PAC can raise / spend on these independent activities; political action committees have several regulations against free spending. Super PACS have existed since 2010, since the United States Supreme Court passed two landmark decisions. The first, Citizens United vs. Federal Election Commission, stated that the first amendment prohibited the government from limiting the amount of independent political expenditures by corporations and unions. Second, Speechnow.org vs. FEC stated PACs that did not directly contribute to candidates, parties, or other PACs were allowed to accept unlimited contributions from individuals, unions, and corporations.