Its only illegal if you aren’t a democrat. For example that young guy who exposed all those activities at Planned Parenthood and Acorn.
The concept of single party consent to recording a conversation implies that at least one participant of a conversation consents to being recorded. James O'Keefe was that one party in all of his recordings, since he was an active particpant in the conversation. None of the participants in the conversation in Mitch McConnell's office gave their consent. The people doing the recording were not part of the conversation.
Does that clear that up?