In this June 29, 2019, file photo, Charles Koch, chief executive officer of Koch Industries, is shown at The Broadmoor Resort in Colorado Springs, Colo. As conservative political groups mobilize to ban what they call critical race theory in schools, one prominent backer of Republican causes and candidates is notably absent. Leaders in the network built by the billionaire Koch family say they oppose government bans and efforts to recall school board members over teaching about race and history in schools. (AP Photo/David Zalubowski, File)
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