Charles Koch has been the more politically active and knowledgeable than his late brother David. For example, it was Charles, not David, who met secretly on June 23, 2017 with [[Mike Pence]] in [[Colorado]]. But Charles is also more advanced in age, and reportedly there are health issues for both. | Charles Koch has been the more politically active and knowledgeable than his late brother David. For example, it was Charles, not David, who met secretly on June 23, 2017 with [[Mike Pence]] in [[Colorado]]. But Charles is also more advanced in age, and reportedly there are health issues for both. |