David Koch steps down from family business, political work

Billionaire David Koch is stepping down from leadership positions in his family’s business and conservative political empire because of deteriorating health, his older brother told company employees in a letter Tuesday.
“We are deeply saddened by this, and will miss David’s insightful questions and his many contributions to Koch Industries,” Charles Koch wrote about his 78-year-old brother.
Charles Koch, 82, has been the primary leader in recent years for the Koch politic