Why This Question Matters
Andrew Myers asks whether outside contributors punish parties when primaries produce extremist nominees — and whether donor behavior moderates candidate extremism in general elections. Understanding this mechanism matters because fundraising shapes campaign viability and can discipline candidate choice beyond primary voters.
How Myers Measures Extremism and Money
- Myers builds an original candidate ideology scale to classify nominees as more or less extremist relative to their primary opponents.
- He uses a regression discontinuity design (RD) around close primary outcomes for U.S. House and Senate contests from 1980–2022 and American state legislative races from 1996–2022 to estimate the causal impact of a narrow “coin-flip” nomination of an extremist over a more moderate rival.
- A complementary panel-based identification strategy is used as a robustness check to reproduce core patterns and explore trends over time.
Key Findings
- When an extremist wins a close primary, the party’s share of general-election contributions falls by about 7 percentage points in the median contest.
- The financial penalty rises to roughly 18–19 percentage points in contests with the largest ideological contrast between the nominees.
- The reduction in funds is larger for corporate PACs than for individual donors.
- The effect operates symmetrically: donors both withdraw support from extremist nominees and redirect contributions toward their opponents.
Robustness and Time Trends
- The RD estimates are supported by the panel-based approach, which also reveals that the financial penalty imposed on extremist nominees has declined by nearly half since about 2000, suggesting a weakening moderating role for donors over recent decades.
Implications for Campaigns and Parties
These results show that general-election donors have historically acted as a tangible check on extremist candidates by reallocating money away from their parties, though that monetary restraint has waned. The findings imply that changes in donor responsiveness—especially among corporate PACs—could alter incentives for parties and primaries, with consequences for candidate selection and electoral competition.
