| Election Date | State | Title | Outcome |
|---|---|---|---|
| Nov. 2, 2010 | Iowa | Measure 1: Natural Resources and Outdoor Recreation Trust Fund | Passed |
| Election Date | State | Title | Outcome |
|---|---|---|---|
| Nov. 3, 2026 | Iowa | Senate Joint Resolution 11: Iowa Two-Thirds Legislative Vote Requirement for Income Tax Increase Bills Amendment | Pending |