*Jamerson, Joshua; Kesling, Ben (September 8, 2019). [https://www.wsj.com/articles/mark-sanford-to-challenge-trump-for-gop-presidential-nomination-11567955858 Mark Sanford to Challenge Trump for GOP Presidential Nomination]. ''The Wall Street Journal''. Retrieved September 9, 2019.</ref> He dropped out on November 12, 2019.<ref>Multiple references: | *Jamerson, Joshua; Kesling, Ben (September 8, 2019). [https://www.wsj.com/articles/mark-sanford-to-challenge-trump-for-gop-presidential-nomination-11567955858 Mark Sanford to Challenge Trump for GOP Presidential Nomination]. ''The Wall Street Journal''. Retrieved September 9, 2019.</ref> He dropped out on November 12, 2019.<ref>Multiple references: |