How did David Koch shape money in American politics?
Clip: 08/23/2019 | 2m 21s | Video has closed captioning.
Billionaire and conservative mega donor David Koch has died. After expanding the Kansas-based Koch Industries into one of the world's largest privately held corporations, Koch and his brother contributed hundreds of millions to GOP candidates through their Americans for Prosperity PAC. David Koch also supported many philanthropic causes and declined to endorse President Trump. John Yang reports.
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