(David Zalubowski | AP file photo) Tanya Trujillo, assistant secretary for water and science at the Department of the Interior, front, makes a point as U.S. Rep Diana DeGette, D-Colo., back left, and Interior Secretary Deb Haaland look on during a news conference at the offices of Denver Water, July 22, 2021, in Denver. Trujillo, a key official overseeing Colorado River negotiations, will step down from her role with the Interior Department on Monday, July 17, 2023.