Melissa Joskow / Media Matters Tucker Carlson is attempting to stay the course amid an advertiser exodus from his Fox News program because of his racist commentary. Carlson had been a mouthpiece for white supremacy, and since being promoted to a prime-time slot on Fox, he has elevated fringe “alt-right” grievances into mainstream media. But what are the consequences of airing unfettered, explicit white supremacy five nights a week on the top rated cable news channel in the U.S.?