WASHINGTON—Billionaire businessman David Koch, who along with his brother has used his fortune to help reshape Republican politics, announced Tuesday that he is retiring from his family-owned company and all political organizations. A letter to Koch Industries employees from its Chairman and Chief Executive Officer Charles Koch attributes David Koch’s decision to deteriorating health. The letter cites an undisclosed health issue that put him in the hospital in the summer of 2016.

Source: Wall Street Journal June 05, 2018 14:16 UTC