Super PACs seeking to influence the 2016 elections have collected more than $1 billion, a record haul driven by jumbo-sized contributions from rich donors on both sides of the aisle. Just 10 mega-donor individuals and couples contributed nearly 20 percent of the $1.1 billion raised by super PACs by the end of August. The total exceeds the $853 million that super PACs collected in the entire 2012 cycle. The top givers were split roughly equally along party lines, with five Republicans, four Democrats and one independent. Together, super PACs seeking to sway the White House and congressional races have pumped more than $674 million into TV ads and other outreach through September, filings show. By the end of the 2012 elections, such groups had spent $608 million. The figures illustrate how American campaigns have been reordered by the ability to give unlimited sums to political committees. In the six years since the Supreme Court's Citizens United v. Federal Election Commission decision created new paths for massive contributions to flow into elections, a tiny sliver of donors with immense financial capacity have rushed to participate. Along with the $1.1 billion raised by super PACs, hundreds of millions more has been directed into politically active nonprofits on both sides of the aisle that can keep the names of their contributors secret. The huge sums washing through campaigns are contributing to a growing estrangement between voters and the political system.