Chief Deputy Whip Diana DeGette About Diana DeGette Chief Deputy Whip Diana DeGette is a 8th term member of Congress, representing Colorado’s 1st Congressional district. In her eight terms serving the Denver metro region, Diana has established herself as a leader for progressive change on health care, reproductive rights, food safety, consumer protection and the environment. DeGette is the most senior legislator in Colorado’s House delegation, and in the 111th Congress she held a large amount of power as the House Democratic chief deputy whip and the vice chair of the influential House Energy and Commerce Committee. With the Republicans taking control of the House in 2010, DeGette lost her vice chair position, but she is still a chief deputy whip and the ranking member of the Energy and Commerce Committee’s subcommittee on Oversight and Investigations.