MP Mark Prisk threatened with a 'punch in face'
A man told his local MP he would come to the constituency surgery and punch him in the face during a string of threatening voicemail messages.
John Collins, 60, left 11 messages on the phone of Hertford and Stortford Conservative MP Mark Prisk on 18 April.
St Albans Crown Court heard Collins told Mr Prisk he would "catch" him.
Collins, of the Knoll, Hertford, was sentenced to four months in prison after earlier pleading guilty to leaving the threatening voice messages.
He appeared via a video link from Wormwood Scrubs prison and the length of time he has spent on remand means he will be immediately released.
As a result of the calls, the former housing and local government minister missed a hustings before the General Election, but held on to his Hertfordshire seat.
Prosecutor Laura Blackband said Collins had previously left "aggressive and rude messages for the MP" in 2014.
Houzla Rawat, mitigating, told the court Collins had "long-standing complaints" by the family law system after being stopped from making contact with his daughter, and "feels the MP did not take him seriously and live up to requirements of constituency MP".
Passing sentence, Judge Andrew Bright QC said: "What you did was very frightening for Mr Prisk and comes against a background of MPs receiving threats and violence, some of which has most tragic consequences."
Collins will be subject to an indefinite restraining order banning him from contacting the MP or his staff.