Colorado
| Bennet, Michael F. - (D – CO) | Class III |
| 702 HART SENATE OFFICE BUILDING WASHINGTON DC 20510 | |
| (202) 224-5852 | |
| e-Mail Senator: bennet.senate.gov/contact/ | |
| Udall, Mark - (D – CO) | Class II |
| 317 HART SENATE OFFICE BUILDING WASHINGTON DC 20510 | |
| (202) 224-5941 | |
| e-Mail Senator: markudall.senate.gov/?p=contact | |
