Super PACs and and other large independent expenditure groups account for most of the outside money flowing into the nine toss-up Senate races nationwide. Here they are with their partisan lean, amount spent in the toss-up races and donors of at least $500,000 each:
- Senate Majority PAC. Democratic. $23.5 million. Major donors include Chicago media owner Fred Eychaner and hedge fund managers/philanthropists James H. Simons and George Soros.
- Freedom Partners Action Fund. Republican. $22.9 million spent. Major donors include Charles Koch and Wisconsin philanthropist Diane Hendricks.
- U.S. Chamber of Commerce. Republican. $16 million spent. No major donors listed.
- NRSC (also known as National Republican Senatorial Committee). Republican. $10.1 million spent. Major donors include hedge fund manager Kenneth C. Griffin and stock broker Charles Schwab.
- Fighting for Ohio Fund. Republican. $7.5 million spent. Major donors include hedge fund managers Paul Singer and Robert L. Mercer and FreedomVote Inc., a Dayton, Ohio, nonprofit.
- American Federation of State, County and Municipal Employees. Democratic. $7.1 million spent. No major donors listed.
- Independence USA PAC. Nonpartisan (gun control). $5 million. Sole donor is former New York Mayor Michael R. Bloomberg.
- End Citizens United. Democratic. $4.6 million. No major donors listed. While ‘End Citizens United’ is not a Super PAC it is one of the largest groups making independent expenditures in the Senate races.
- Women Vote! Democratic. $3.9 million. Major donors include Priorities USA (a Democratic Super PAC founded by backers of President Obama), hedge fund manager S. Donald Sussman and Bloomberg.
- Planned Parenthood Votes. $3.1 million. Major donors include Jonathan Allan Soros, Jennifer Allan Soros, George Soros and Amy Goldman Fowler.
Source: Federal Elections Commission