Veteran South Carolina Senator Lindsey Graham has died at the age of 71, just one day after returning from a diplomatic trip to Ukraine. In this video, we break down the timeline leading up to his sudden death, the preliminary medical examiner's findings, the emergency response at his Washington, D.C., home, and the reactions from US President Donald Trump and other officials.

The South Carolina senator’s office said the 71-year-old died after a “brief and sudden illness.”

The South Carolina senator’s office said the 71-year-old died after a “brief and sudden illness.”

South Carolina Senator Lindsey Graham, a close aide of US President Donald Trump, has died.

South Carolina Senator and US President Donald Trump's close aide passed away on Saturday at the age of 71.

Lindsey Graham, a prominent Republican senator, has died at the age of 71 from a brief illness.