Billionaire conservative activist and philanthropist David Koch has died at 79. The death of Koch was confirmed on Friday by his brother, Koch Industries CEO Charles Koch. "It is with a heavy heart that I announce the passing of my brother David," Charles Koch said. "Anyone who worked with David surely experienced his giant personality and passion for life." Along with his brother, Koch had been an extraordinarily influential conservative political donor for decades, with the Koch brothers' network having spent more than $1 billion in recent elections. He also donated more than $1 billion to charity and served as the Libertarian Party's nominee for vice president in 1980. Koch retired as vice president of Koch Industries in 2018 due to his declining health.
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