Government: Legislature: Us Senate

• Regional: United States: Colorado: Society and Culture: Politics: Candidates and Campaigns: US Senate 

• GovTrack: Sen. Michael Bennet  - Tracks bill sponsorship, voting record, committee membership and features analysis.
• Project Vote Smart - Senator Mark E. Udall  - Includes biographical details about the Senator, voting record, issue positions and campaign finance information.
• Senator Mark Udall  - Features current news, biography, details about issues and services.
• Senator Michael F. Bennet  - Democratic Senator provides news, details about issues and projects, services and contact information.