Democratic U.S. Rep. Raúl M. Grijalva, a prominent advocate for environmental protection during his 12 terms in Congress, passed away at the age of 77 due to complications from cancer treatments. Grijalva, who chaired the House Natural Resources Committee and was a leading Democrat on the committee, had been absent from Congress in recent months while undergoing cancer treatment. Known for his dedication to causes like protecting the Grand Canyon and strengthening the Affordable Care Act, Grijalva was a liberal leader who focused on environmental issues throughout his career.

Having announced his cancer diagnosis in April last year, Grijalva continued his work despite missing numerous House votes. He had planned to retire in 2026 after stepping down from his committee position earlier this year. His passing leaves a vacancy in his seat, to be filled through a special election later in the year. The Democratic primary for his replacement is anticipated to be a competitive contest between allies of Grijalva and a more moderate faction, with potential candidates including his daughter and other local officials.

Fellow politicians, such as Democratic Sen. Ruben Gallego, praised Grijalva for his advocacy and role as a mentor to many in Arizona. Grijalva’s legacy includes his efforts on water supply security, conservation funding, and protection of natural areas, including advocating for a new national monument near the Grand Canyon and opposing a proposed copper mine in southern Arizona. His commitment to representing marginalized voices and dedication to environmental causes have left a lasting impact on Arizona and the nation.