Ah! Corney, Man from the island of Corn! Comey standing in an island of corn! (Old meaning of grain corns, Wheat/barley, not maize.) It might have something to do with David Corn, but I don't quite see the relation.
https://www.buzzfeednews.com/article/hayesbrown/jim-comeys-been-tweeting
"Honestly, poorly framed, depressing photographs appears to be Comey's Thing, like this one from Gettysburg, an assumed subtweet of the guy who fired him."
(Or has this misspelling been thrashed out and found to be an OCR error?)