Key takeaways:

• Raúl Grijalva, Democratic Congressman from Arizona, has died at the age of 77 after battling cancer.
• He was known for his environmental advocacy and leadership on various committees during his 12 terms in Congress.
• Grijalva's passing marks the second loss for House Democrats within a month.

Washington — Congressman Raúl Grijalva, a prominent Democratic figure from Arizona, passed away on Thursday morning at the age of 77 due to complications from cancer treatment. His office confirmed the news, expressing that Grijalva had fought a "long and brave battle" against the illness. The congressman, who announced his cancer diagnosis in April 2023 after suffering from a persistent cough, had become a fixture in Congress, championing numerous progressive causes throughout his two-decade career, particularly in environmental protection and immigrant rights.

"Serving Southern Arizona was the honor of Raúl M. Grijalva's life," his office stated, highlighting his long tenure as the longest-serving member of Arizona's congressional delegation. Grijalva played a pivotal role as chair of the U.S. House Natural Resources Committee and co-chaired the Congressional Progressive Caucus, where he made significant contributions to environmental legislation, including efforts to permanently safeguard the Grand Canyon.

Despite being absent from Congress during most of his treatment, Grijalva secured re-election in November 2024, underscoring his popularity in a strongly Democratic district. His seat is expected to remain vacant until a special election is held later this year, following Arizona state law. Democratic leaders, including House Democratic leader Hakeem Jeffries, mourned the loss, recognizing Grijalva as a "giant" in the political landscape.

Grijalva's passing comes shortly after the death of Texas Rep. Sylvester Turner, marking a challenging time for House Democrats. In remembrance, several Democratic officials have expressed their condolences, with Senator Ruben Gallego remarking on Grijalva's role as a mentor for young Latinos in public service, and commending his relentless efforts for the underprivileged.

Grijalva's commitment to his community and the environment will be remembered as a guiding force in his political legacy. His office will continue to assist constituents until the transition to new representation.

For more details, visit CBS News, HuffPost, and Los Angeles Times.