Carl is a work of fiction, invented by a couple of journalists/friends as a parody of pundits: https://www.washingtonpost.com/posteverything/wp/2016/05/09/... - the story is hilarious. Watching this whole thing unfold on Twitter has been a total blast too (check out @carl_diggler), they never break character and have a lot of running gags (such as Carl's troubles in "Family Court"). Here's a wee excerpt from that WP link:
" Carl exists to satirize all that is vacuous, elitist and ridiculous about the media class. From his sycophantic love of candidates in uniform to his hatred of Bernie Bros, from his reverence for “the discourse” to his constant threats of suing the people who troll him on Twitter, Carl is predicated on being myopic, vain and — frankly — wrong.
But something funny happened along the way. Biederman and I, who are neither statisticians nor political scientists, started making educated guesses for our parody about the results of the primaries. And we were right. A lot.
We beat the hacks at their own game by predicting every Democratic winner on Super Tuesday. We told readers who would win in the unpredictable caucuses that FiveThirtyEight didn’t even try to forecast, such as those in Minnesota, Wyoming and even American Samoa. We called 19 out of the past 19 contests. FiveThirtyEight, whose model cannot work without polling, accurately predicted 13 "