North Carolina's Republican candidate for governor promised to stay in the race on Thursday after CNN reported that he once called himself a "black NAZI!" and proposed bringing back slavery in comments posted on a pornography website.

North Carolina Lt. Gov. Mark Robinson, the state’s Republican candidate for governor, said he would stay in the race and denied new accusations that he posted racist, antigay and inflammatory comments on a pornography-website message board more than a decade ago.

Donald Trump risks being doomed by what he wrought in North Carolina. An already fiercely fought presidential contest in the critical swing state was thrown into greater turmoil Thursday by a stunning CNN investigation revealing a porn-site scandal surrounding Republican gubernatorial candidate Mark Robinson.