Iowa
| Grassley, Chuck - (R – IA) | Class III |
| 135 HART SENATE OFFICE BUILDING WASHINGTON DC 20510 | |
| (202) 224-3744 | |
| e-Mail Senator: grassley.senate.gov/contact.cfm | |
| Harkin, Tom - (D – IA) | Class II |
| 731 HART SENATE OFFICE BUILDING WASHINGTON DC 20510 | |
| (202) 224-3254 | |
| e-Mail Senator: harkin.senate.gov/contact.cfm | |
