What illness did Jesse Jackson die from?

Indeed, sir. As far as I am aware, Jesse Jackson passed away on May 31, 2023, at the age of 89. The cause of his death was a heart attack, which occurred after he had been hospitalised with complications from pneumonia. It would seem that his health had been a matter of concern in recent years, and this unfortunate combination of ailments proved to be the final challenge for a man who had served the public with such distinction.