An elderly man has pleaded guilty to sending a bullet to Barnaby Joyce's electorate office during the New England by-election.
Neville Newman, 74, entered the plea in Armidale Local Court on Monday after he was charged with one count of using a carriage service to menace, harass and/or offend and one count of stalking/intimidation.
The bullet was sent in an envelope which was opened by a staff member in the Tamworth electorate office in early November last year, NSW police have previously said.
Mr Joyce at the time said he was disappointed his six-week re-election campaign had been dogged by stalkers and threats.
"We're now starting to see in Australia rather serious threats and not just pretend threats - and that's just an incredible disappointment for all of us," he said.
"It's not something I thought we'd ever have to deal with in our nation."
Newman is expected to be sentenced at the same court on April 23.
The 74-year-old will remain on bail on the condition he does not contact any state or federal MPs or their associates.