https://www.mylife.com/mark-yancey/e502381951836|title=Mark Yancey (Spencer)|publisher=Mylife.com|accessdate=December 27, 2019}}</ref> who is challenging [[Moderate Republican]] [[U.S. Senator]] [[John Cornyn]] in the [[Republican Party|GOP]] senatorial primary to be held on March 3, 2020. | https://www.mylife.com/mark-yancey/e502381951836|title=Mark Yancey (Spencer)|publisher=Mylife.com|accessdate=December 27, 2019}}</ref> who is challenging [[Moderate Republican]] [[U.S. Senator]] [[John Cornyn]] in the [[Republican Party|GOP]] senatorial primary to be held on March 3, 2020. |