Former Arizona Senator Jon Kyl, a Republican who served in Congress for over 25 years and became a pivotal force in judicial confirmations, passed away Thursday at the age of 84. His family announced that he died from complications related to a neurological disease.
In a statement, the Kyl family said: “Our husband, father, grandfather, son, and brother, Jon Kyl, has passed away at the age of 84 due to complications from a neurological disease.” They added, “We know that Jon belonged to all of Arizona, a state he loved and explored with vigor, curiosity, and wonder. Serving his state and nation in Congress was a privilege and responsibility he honored and respected. We are grateful for his full and meaningful public life.”
Kyl’s political career spanned more than two decades in Washington, beginning with his service in the U.S. House from 1987 to 1995, followed by three terms in the Senate from 1995 to 2013. He rose to the position of minority whip during his final years in the chamber, making him a key figure in GOP leadership.
After leaving the Senate, Kyl became a prominent lobbyist and was instrumental in shepherding Supreme Court Justice Brett Kavanaugh’s nomination through a contentious confirmation process. He also worked on immigration issues, advocating for Dreamers after President Trump ended the Deferred Action for Childhood Arrivals (DACA) program.
In 2018, Kyl was appointed by then-Governor Doug Ducey to fill the seat left vacant by the late Senator John McCain, serving out the remainder of McCain’s term. Ducey praised Kyl as a mentor and friend, writing on social media: “Jon Kyl gave Arizona nearly three decades of principled, thoughtful leadership — and he gave me something just as valuable: his mentorship and friendship. I’ll miss him deeply. Rest in peace, Senator Kyl.”
Kyl announced in late 2025 that he had been diagnosed with dementia and would withdraw from public life. He is survived by his wife of over fifty years, Caryll, their two children, Kristine and John, and four grandchildren. The couple met during college, and Caryll worked as a nurse to support Kyl through law school. He graduated in 1966 and moved to Phoenix to begin his legal career.
Kyl’s death marks the loss of a respected conservative voice on national security and judicial matters. His legacy includes a lasting impact on the federal judiciary, particularly through his work on Kavanaugh’s confirmation, as well as his efforts on immigration reform.
Memorial services will be announced at a later date. Political leaders across the spectrum are expected to pay tribute to Kyl’s decades of public service.
