National's sitting MP in Kaikoura, Colin King, was ousted by his own party last night after a challenge from a local farmer at a selection meeting.
Mr King has been the MP since 2005 but a new candidate, Stuart Smith, secured the nomination to represent National at next year's election.
A local farmer and grape grower, Mr Smith secured the nomination with a majority of support from the delegates present.
"National's selection process is highly democratic. Nothing is pre-determined and I congratulate Stuart for securing the nomination," said Canterbury-Westland Regional Chair Roger Bridge.
"Stuart has been an advocate for Marlborough communities for many years and will offer voters a strong voice in John Key's National Party at the next election."