"Under United States federal law and most state laws there is nothing illegal about one of the parties to a telephone call recording the conversation, or giving permission for calls to be recorded or permitting their telephone line to be tapped. However, several states (e.g., California, Connecticut, Florida, Illinois, Maryland, Massachusetts, Montana, Nevada, New Hampshire, Pennsylvania and Washington) require that all parties consent when one party wants to record a telephone conversation."

http://en.wikipedia.org/wiki/Telephone_recording_laws

Too bad he's in New Hampshire, otherwise him being one of the party aware of recording the conversation would make the recording perfectly legal.