Mark Udall represented Colorado in the U.S. Senate from 2009-2015. He previously served in the U.S. House of Representatives and the Colorado State House of Representatives. He identifies as a Democrat.
2004
–Endorsed Ken Salazar (D) for Senator of Colorado (won)
2008
–Endorsed Barack Obama (D) for President (won)
2010
–Endorsed Michael Bennet (D) for Senator of Colorado (won)
2016
–Endorsed Hillary Clinton (D) for President (lost general election)
2018
–Endorsed Diane Mitsch Bush (D) for Representative of Colorado, 3rd District (lost general election)
–Endorsed Jason Crow (D) for Representative of Colorado, 6th District (won)
2020
–Endorsed Joe Biden (D) for President (won)
–Endorsed Diane Mitsch Bush (D) for Representative of Colorado, 3rd District (lost general election)
2022
–Endorsed Jared Polis (D) for Governor of Colorado (won)
–Endorsed Michael Bennet (D) for Senator of Colorado (won)
2024
–Endorsed Marlene Galán-Woods (D) for Representative of Arizona, 1st District (lost primary)
The Endorsement Project 