Priorities USA Action, an independent group founded by former Obama aides, raised $4.4 million in 2011 from donors that included:

— John C. Law, the managing director of Warland Investments, a commercial real estate and investment firm in Santa Monica, Calif. He donated $100,000. Law is on the board of directors of Cedars-Sinai Medical Center in Los Angeles. He served as chairman of the board at Cedars-Sinai from 2005 to 2007.

Lobbying disclosure records filed with Congress show Cedars-Sinai spent $369,000 in 2011 on lobbying for Medicare and Medicaid funding for teaching hospitals and electronic medical records, the National Institutes of Health and Army research programs.

— Steven Spielberg, the Hollywood movie director and co-founder of Dreamworks Animation, who gave $100,000. Jeffrey Katzenberg, Spielberg's partner in Dreamworks, last year donated $2 million to Priorities USA Action, making him the group's single largest donor. Spielberg and Katzenberg are longtime supporters of Democratic causes.

— William E. Little Jr., who gave $150,000. Little is the former chairman of George Little Management, a trade show production and marketing company in White Plains, N.Y. Little said the re-election of Obama is "extremely important for welfare of the United States going forward."