Andy Borowitz, Tracy Klugian and Harland Dorinson

For a couple of years now I've subscribed to The Borowitz Report and I am a big fan. I also have a good memory for names, which could be why I noticed that Borowitz recycles them. Very often he attributes quotes from spokesmen, men on the street, or experts to either Harland Dorinson or Tracy Klugian. Also, Davis Logsdon, as I discovered writing this blog. And there may be others. By the way, Tracy is always "he," as far as I can tell, although Tracy can be a woman's name, too. As to the use of "he," Mr. B. should read NE-NER-NIS to learn how easily he could avoid choosing a sex for ambiguously-named persons.
          Nowhere on the web could I find a mention of the ubiquity of Klugian and Dorinson. This leaves me wondering whether they are completely fictitious or just (un)lucky enough to be associated with so many different statements and fields. They also grow old and young and old again at Andy's fancy: he always
mentions the ages of his people on the street. And yes, they are almost always men* unless the story particularly requires a woman speaker.
           Charities often auction the right to name a character in a book. Jane Smiley mentioned at a reading from Private Life at the University of Iowa last summer that this was how she had chosen the name for one of her characters. (The book is, by the way, deep and profound, with remarkable insights about life and relationships. It tells the story of the apparently simple, mostly bland life of a woman whose experiences are not what anyone would immortalize in a movie. They are just what really happens.)
           Thus the question is: are Tracy Klugian and Harland Dorinson real people who have obtained the right to be in The Borowitz Report by donating to Andy's favorite charity, or are they names he made up, perhaps after making sure that there were no such real people at least as far as Google and Facebook revealed? I checked this myself today.
Google: Based on the first two pages of hits, Tracy Klugian is only found in Borowitz Reports. I thought I'd found Harland Dorinson somewhere else, but it was in a politically conservative (as self-described) blog that copied a Borowitz piece verbatim but without attribution. I won't link to it because I have a serious problem with lack of attribution, but here is the link for the original piece by Borowitz, from 2008, "Recession Resulting in Crappiest Presents Ever". Reading it brought the name Davis Logsdon to my attention. I thought I'd seen it recently. Sure enough, Davis also appears frequently.
Facebook: Facebook has no entries for Tracy K nor Harland D although facebook's bing search shows a zoominfo entry for a Tracy Klugian, spokesman for Ohio Art. That's one of Borowitz's jokes.
           To begin to appreciate how often Andy has used these names, search The Borowitz Report website. This link is for Tracy Klugian.
           Do other names recur on the Borowitz Report? Now I'll be on the lookout. And if you notice any, please let me know.

*It is rare that Borowitz quotes a fictitious female. I tried searching his site for "she." Alas, you can't include a blank after the word, so you get a hit every time he mentions that prices have been slaSHEd on his book. You also get hits for fictitious quotes from real females. But fictitious females? Few inhabit Andy's fictional world. Hence the answer to the riddle, how is Borowitz like the film industry in general and Pixar in particular? For more on that, see my explanation for why I was down on Up (the movie) and how disappointed I was that Kathryn Bigelow's Oscar was for an otherwise all-male production.