So if James Corney = James Comey.
Than .corn = .com ?
Could [.corn] be a hidden internet adress or something? Just like "Comey" was hidden for search results in the FBI database, because they changed his name to [Corney]
I don't know about the James Comey connection but Grassley is very interested with al his ? tweets
https://search.justice.gov/search?query=corney&op=Search&affiliate=justice