Almost half of the itemized reported expenses for super PACs and hybrid PACs — $36 million — went toward overhead costs such as compensation and marketing. More than $4 million went for fundraising. Other major expenses included costs for advocacy, research and mailings. Click a bar to see a breakdown of each spending category.
Source: Center for Public Integrity analysis of Federal Election Commission data covering 2013 spending, excluding non-federal costs, transfers, refunds and in-kind expenses.