How did Lindsey Graham die? Republican Senator Lindsey Graham died from a natural cardiovascular cause. Preliminary findings indicate an aortic rupture due to hardening of the arteries. Poisoning theories emerged from MAGA supporters that either Russia or Iran might have poisoned him. US officials have found no evidence of foul play in his sudden passing.

Graham's death sparks questions on cardiac arrest that is caused by an electrical malfunction in the heart that disrupts its pumping action. The heart then stops beating.

The sparse statement by Graham’s office, which did not explain his death, comes during a stretch of concern about a lack of transparency about lawmakers’ health.