[MayflowerMadam]

“that’s what Sean Hannity calls him.”

IIRC, back in “the day” he would be a guest on Rush’s show, and Rush started calling him “The Great One”. (I could be wrong.)

[TChad]

I thought you were probably right, but FWIW the site below credits Hannity.

https://www.conservapedia.com/Mark_Levin