Jon Kyl, the former Republican U.S. Senator from Arizona who served three terms and was known for his behind-the-scenes skills and influential leadership, has passed away at the age of 84 due to complications from neurological disease. Kyl, who filled John McCain’s Senate seat and was a key figure in shaping water policy in the Southwest, is remembered by colleagues such as former Arizona Senator Jeff Flake as a committed public servant. His death prompted reflections on his legacy and contributions, especially in the areas of tribal water settlements and other notable policies. The University of Arizona mourns his passing, as locals and politicians honor his impact on the state.