Just 47 people account for more than half (57.1 percent) of the $230 million raised by super PACs from individual donors, according to the study by U.S. Public Interest Research Group (U.S. PIRG) and Demos, two liberal research and advocacy organizations. Just over 1,000 donors giving $10,000 or more were responsible for 94 percent of the money raised. They calculate that it would take 321,000 middle-income families, donating an equivalent share of their wealth (0.15 percent), to match the Adelsons' giving. Super PAC donations: Small group, a big dent Do Middle Class Republicans feel that someone like Sheldon who has tens of billions of dollars share their "interests and needs". The other question is "Are there any Middle Class Republicans"? If so, why do they vote against their own self interests?