Rep. Raul Grijalva, D-Ariz., died of lung cancer-related issues on Thursday morning, his office announced in a statement. In Congress, the southern Arizona Democrat was most known for his work on the House Natural Resources committee. 

“From permanently protecting the Grand Canyon for future generations to strengthening the Affordable Care Act, his proudest moments in Congress have always been guided by community voices,” the statement read. 

“He led the charge for historic investments in climate action, port of entry modernization, permanent funding for land and water conservation programs, access to health care for tribal communities and the uninsured, fairness for immigrant families and Dreamers, student loan forgiveness, stronger protections for farmers and workers exposed to extreme heat, early childhood education expansion, higher standards for tribal consultation, and so much more,” the statement continued.

“Some of these victories seemed out of reach when he first came to Congress, but with support from community, colleagues, allies, and staff, he helped make them real.”

The southern Arizona Democrat was 77 years old, and he had served in Congress since 2003. While receiving treatment, he had undergone local scrutiny for missing dozens of votes on Capitol Hill, KOLD reported.

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There was an outpouring of condolences for the late congressman. 

“First and foremost, as someone who lost their father recently, I want to express my sincerest condolences to the Grijalva family,” Arizona state Rep. Alma Hernandez, D-Tucson, told Fox News Digital. “Losing a parent is beyond one of the hardest experiences one can face. Outside of this political world we are all normal human beings. May the family find peace in the memories that they lived with the Congressman.”

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“A genuinely devastating loss,” Rep. Alexandria Ocasio-Cortez, D-N.Y., posted to X. “Raúl Grijalva stood as one of the biggest champions for working people in all of Congress. His leadership was singular. He mentored generously and was an incredible friend. I will always be grateful for his lifelong courage and commitment.” 

“Sydney and I are saddened to hear about the passing of our friend Rep. Raúl Grijalva. He was a champion for those in need and dedicated his life to fighting for all Arizonans. He will be missed,” Sen. Ruben Gallego, D-Ariz., posted to X.

“The Congressman was always very kind to me— he had a great sense of humor. As a fellow animal lover, we often found ourselves working together on animal protection issues,” Rep. David Schweikert, R-Ariz., posted. To his daughters Adelita, Raquel, and Marisa, and his wife, Ramona, I send my deepest condolences. May [he] rest in peace.”

“Arizonans today lost a dedicated public servant. Raul was a fearless champion of the causes he believed in and he never forgot where he came from,” Rep. Juan Ciscomani, R-Ariz., posted. “While we often disagreed about public policy, he welcomed me into our congressional delegation warmly and always treated me with respect and dignity. Laura and I are praying for his wife Ramona, his 3 children, and all of his family and friends during this difficult time.”

“AZ lost a giant today. Congressman Raul Grijalva dedicated his life to fighting for the people of Arizona. From standing up for working families, Indigenous communities, and clean air and water — Raul leaves a legacy that is unmatched. I am thinking of his family and loved ones,” Arizona Attorney General Kris Mayes posted.

The Democrat represented a deep blue district, leaving the door wide open for a competitive primary.