Money plays a large role in influencing US politics through various avenues such as interest groups, lobbyists, political action committees (PACs), and 527 organizations. Interest groups represent special interests and try to educate the public and influence politicians. Lobbyists directly communicate with politicians to persuade them to support certain legislation. PACs and 527s can raise unlimited funds which they use to support candidates and political issues. There are concerns about how these avenues for funding can undermine the political process when taken to an extreme.