Senator Lindsey Graham of South Carolina died at age 71 after a brief and sudden illness, his office confirmed. A medical examiner released a preliminary cause of death attributing his passing to an aortic dissection, a life-threatening condition in which a tear forms in the inner layer of the aorta, the body's largest artery. Graham had served in the U.S. Senate since 2003 and was one of the most recognizable figures in Republican politics.

An aortic dissection is considered a cardiovascular emergency and is frequently fatal if not treated immediately. The condition can develop with little warning, which is consistent with accounts of Graham experiencing a sudden illness before his death. Survivors of such events typically require emergency surgical intervention.

Graham was widely known for his outspoken positions on U.S. foreign policy and national security, often advocating for a robust American military presence abroad and strong support for allies including Israel and Ukraine. He was a senior member of the Senate Armed Services Committee and the Senate Judiciary Committee, and served as a military lawyer and Air Force Reserve officer earlier in his career.

In his later years in the Senate, Graham became a close ally of President Donald Trump after an initially adversarial relationship during the 2016 presidential campaign. He remained a prominent defender of the administration's positions on a range of domestic and foreign policy issues. Tributes from across the political spectrum acknowledged his decades of public service and his impact on U.S. defense and foreign policy debates.

Graham's death creates a vacancy in the U.S. Senate from South Carolina. Under state law, the governor of South Carolina holds the authority to appoint a replacement to serve until a special election is held. The timing and process for filling the seat are expected to be announced in the coming days.