Arizona Senator Jon Kyl Dies At Age 84 From Neurological Disease

Jon Kyl, a prominent Arizona politician who served in Congress for nearly three decades as the Senate's No. 2 Republican, has died at age 84. His family announced his death on Thursday due to complications from a neurological disease that manifested as dementia. Diagnosed with the condition in December of this year (2025), Kyl withdrew from public life but remained active until shortly before his diagnosis. He represented Arizona for almost 30 years and was known for his expertise on the Constitution.