PHOENIX — Former U.S. Sen. Jon Kyl, a longtime Republican lawmaker from Arizona who shaped landmark water policies in the U.S. West and guided the confirmation of Supreme Court Justice Brett Kavanaugh, has died. He was 84.

Kyl died Wednesday night from a neurological disorder, said Gordon James, a communications professional who is longtime friends with the Kyl family. Kyl had withdrawn from public life in December 2025 after announcing he had been diagnosed with dementia.

Kyl spent almost three decades in Congress, serving in both chambers, and watched his party undergo a drastic transformation, with his career spanning Ronald Reagan’s…

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