
Historical · U.S. Senate · Colorado
Mark Udall
Former U.S. Senator from Colorado · 1999–2015 · Democratic · Class 2
Mark Udall represented Colorado in the United States Senate (1999–2015) for the Democratic party. The page below collects sourced biographical facts, term history, committee roles, and provenance for Udall.
Bioguide ID: U000038
Key facts
- Full name
- Mark Udall
- State
- Colorado
- Party
- Democratic
- Senate class
- Class II
- Term(s) in office
- 1999–2015
- First took office
- 1999
- Status
- Left office
- Current term ends
- —
- Born
- 1950
- Bioguide ID
- U000038
- Committee assignments
- —
- Dataset version
- 20260601-1
Biographical narrative
870 words · sourced from the Wikipedia REST extract
Mark Udall is a former United States Senator from Colorado, representing the state from 2009 until 2015. A member of the Democratic Party, Udall previously served in the U.S. House of Representatives, where he represented Colorado's 2nd congressional district. His political career is marked by a focus on environmental issues, renewable energy, and the protection of natural resources. Born into a politically active family, Udall has a rich background in public service and outdoor education, which has influenced his legislative priorities.
Early life and career
Mark Udall was born on July 18, 1950, in Tucson, Arizona. He is the son of Patricia J. (née Emery) and Morris "Mo" Udall, who served as a U.S. Representative for Arizona's 2nd congressional district from 1961 to 1991. Mo Udall was also a candidate for the Democratic presidential nomination in 1976. Growing up in a politically engaged family, Mark Udall was influenced by his father's career and the political environment surrounding him. He graduated from Canyon del Oro High School in 1968, where he was elected student body president and won the Arizona State Golf Championship in the boys' division that same year.
Following high school, Udall attended Williams College, where he earned a Bachelor of Arts degree in American civilization in 1972. After completing his education, he worked as a field coordinator for his father's presidential campaign in 1976, gaining firsthand experience in political campaigning. Subsequently, Udall moved to Colorado, where he began a career with Outward Bound, a nonprofit organization focused on outdoor education. Over the course of two decades, he served as a course instructor and later as the Executive Director of Outward Bound in Colorado, leading outdoor expeditions and educational programs.
In 1996, Udall transitioned into politics, encouraged by local leaders to run for the Colorado House of Representatives. He successfully campaigned for the 13th district seat, narrowly defeating his Republican opponent, Drew Bolin. During his two-year tenure in the Colorado House, Udall served on the Judiciary and Agriculture, Livestock & Natural Resources Committees. He proposed a significant piece of legislation aimed at establishing a Renewable Electricity Standard, which sought to mandate that a portion of Colorado's energy consumption come from renewable sources. However, this bill did not advance beyond the committee stage. After completing his term, Udall chose not to seek re-election and instead pursued a seat in the U.S. Congress.
Senate tenure
Udall's congressional career began when he was elected to represent Colorado's 2nd congressional district in the U.S. House of Representatives. He won a competitive primary in 1998, securing 44% of the vote against three opponents. In the general election, he faced Republican nominee Bob Greenlee, the mayor of Boulder. The election was closely contested, but Udall emerged victorious with 49% of the vote, marking the beginning of a successful tenure in the House, where he was re-elected five times without significant opposition.
In 2008, Udall announced his candidacy for the U.S. Senate seat being vacated by retiring Republican Wayne Allard. He ran unopposed in the Democratic primary and faced Republican Bob Schaffer in the general election. The race was characterized by significant spending on attack ads, with over $10 million directed against Udall. Despite the competitive nature of the election, Udall maintained a lead in the polls and ultimately won by a margin of over 240,000 votes.
Udall's Senate term began on January 6, 2009. During his time in the Senate, he focused on various issues, particularly those related to environmental protection and renewable energy. He was known for his advocacy for the expansion of national parks and the preservation of natural resources. In 2014, he sought re-election but faced Republican challenger Cory Gardner. Although Udall was initially favored in the polls, Gardner gained momentum as the election approached. Ultimately, Udall was narrowly defeated, concluding his Senate career on January 3, 2015.
Legislative focus and committees
Throughout his time in both the House and Senate, Udall's legislative focus was heavily oriented toward environmental issues and renewable energy initiatives. He was a proponent of policies aimed at increasing the use of renewable energy sources and reducing reliance on fossil fuels. His commitment to environmental conservation was evident in his support for legislation that sought to expand national parks and protect public lands.
In the Senate, Udall served on several key committees that aligned with his legislative priorities. His involvement in these committees allowed him to influence policy on energy, natural resources, and environmental protection. He was particularly active in discussions surrounding climate change and the transition to a more sustainable energy economy.
Udall's advocacy extended beyond environmental issues; he also addressed social issues, including women's rights and reproductive health. His campaign for re-election in 2014 prominently featured these topics, as he sought to differentiate himself from his opponent, Cory Gardner. Despite his efforts to focus on these critical issues, his campaign faced challenges, and he ultimately lost the election.
Mark Udall's political career reflects a deep commitment to public service and environmental stewardship. His background in outdoor education and his family's political legacy shaped his approach to governance and policy-making. Although his Senate tenure concluded in 2015, his contributions to environmental legislation and advocacy for renewable energy continue to resonate in Colorado and beyond.
Notable legislation
Sponsored and co-sponsored legislation for Mark Udall is pending operator curation. The biographical narrative above carries the same provenance trail until per-bill rows are written.
Sources
- [1]https://en.wikipedia.org/wiki/Mark_Udallwikipedia · retrieved 2026-06-01
Notable quotes
Sourced quotes for Mark Udall are pending operator curation. Narrative-scope provenance remains attached below.
Sources
- [1]https://en.wikipedia.org/wiki/Mark_Udallwikipedia · retrieved 2026-06-01
Key positions
Curated policy positions for Mark Udall are pending operator review. The biographical narrative above carries the same provenance trail until per-topic positions are written.
Sources
- [1]https://en.wikipedia.org/wiki/Mark_Udallwikipedia · retrieved 2026-06-01
Terms served
- 1999–2001Term 1 · Democratic
- 2001–2003Term 2 · Democratic
- 2003–2005Term 3 · Democratic
- 2005–2007Term 4 · Democratic
- 2007–2009Term 5 · Democratic
- 2009–2015Term 6 · Democratic · Class II
Sources & provenance
Every attributable claim above carries a per-section [N] marker that resolves to the corresponding URL below. Each entry records the upstream provider, the canonical URL, and the timestamp at which the source was retrieved by the ingest pipeline.
Key facts
- https://bioguide.congress.gov/search/bio/U000038bioguide · retrieved 2026-06-01
- http://www.markudall.senate.govsenate.gov · retrieved 2026-06-01
Biographical narrative
- https://en.wikipedia.org/wiki/Mark_Udallwikipedia · retrieved 2026-06-01
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