U.S. Senate · Iowa
Sen. Joni Ernst (R)
Represents Iowa, in office since Jan. 3, 2021. Official site
$18.10spent by the campaign for every vote cast in the 2020 general election
- This race$18.10
- Opponent$33.69
- IA average$13.86
- Senate average$13.91
Ranks 22 of 96 senators (1 = most spent per vote).
The 2020 race
| Candidate | Votes | Campaign spent | Per vote cast |
|---|---|---|---|
| Joni Ernst (R), won | 864,997 (51.7%) | $30,255,100 | $18.10 |
| Theresa Greenfield (D) | 754,859 (45.2%) | $56,328,076 | $33.69 |
Total votes cast: 1,671,828. “Per vote cast” is the campaign’s total spending for that election divided by all votes cast in the race.
Tracked issue money in 2026
| Issue | Groups | Given | Bundled | Spent for | Spent against |
|---|---|---|---|---|---|
| HousingReal estate and home building | Realtors PAC (RPAC), NAHB BUILD-PAC, NMHC PAC | $8,000 | $0 | $0 | $0 |
| Health care costsHospitals, doctors and drugmakers | AHA PAC | $1,000 | $0 | $0 | $0 |
| AI & data centersAI and tech company PACs | Google NetPAC, Amazon PAC | $7,500 | $0 | $0 | $0 |
| GunsGun rights | NSSF PAC | $5,000 | $0 | $0 | $0 |
| Energy & climateOil and gas industry | Chevron PAC | $5,000 | $0 | $0 | $0 |
| IsraelAIPAC and allied groups | AIPAC PAC | $0 | $234,628 | $0 | $0 |
| DefenseDefense contractors | Lockheed Martin PAC, RTX PAC, General Dynamics PAC, Northrop Grumman PAC, Boeing PAC | $24,000 | $0 | $0 | $0 |
IA’s other senator
Results: state-certified totals (sources in How this works). Spending: FEC candidate totals for the 2020 election (as of Oct. 6, 2026). How this is calculated.