Recent research offers compelling answers to these criticisms. The new evidence adds credence to the Bartels-Gilens-Hacker view that money is corrupting American politics. By using a massive database of ideology that includes the super wealthy, Schaffner and Rhodes found that “members of Congress are much more responsive to the wealthy than to their poor constituents.” However, this difference is not equal between both parties; rather, Democrats are far more responsive to the poor than Republicans. (This is not surprising; other research supports this claim.) They find that both parties strongly favor the upper-middle class, those with $100,000 to $300,000 in wealth. But Republicans are not only more responsive to the rich, but particularly to rich donors. Schaffner and Rhodes argue that, “campaign donations, but not voter registration or participation in primary or general election, may help explain the disproportionate influence of the wealthy among Republican representatives.”
Barber’s study is the first to directly examine the policy preferences of the donor class. Barber sent 20,500 letters to people who contributed to 22 Senate elections in 2012 and asked about various policy questions. This allowed Barber to examine the differences in representation between donors and non-donors. His finding: Donors’ preferences tend to be far better represented than non-donors’. The chart below measures the ideological differences between various groups, with 0 indicating a perfect fit. The data show that Senators are almost perfectly aligned with their donors, but rather distant from voters.