Comey over-stepped his authority and set himself up as Judge, jury, and prosecutor. As for talking about on-going investigations they should be made VERY public when it involves any elected member of the House, Senate, and the President and VP.
Every local news channel reports on crime and the local law enforcement agencies appeal to the public for assistance and tips. After the arrest then they clam up, as they should. Why should potential crimes that involve politicians be treated any different?