Not sure what he meant but was in response to the Comey tweet in the corn field. Taunting Comey about something that Comey would understand?
I think the corn reference is about David Corn he and Michael Isakoff were the reporters that were leaked the phony dossier to get the Russian hoax into the media
Now, memos the FBI is turning over to Congress show the bureau possessed at least three versions of the dossier and its mostly unverified allegations of collusion.
Each arrived from a different messenger: McCain, Mother Jones reporter David Corn, Fusion GPS founder (and Steele boss) Glenn Simpson.