 The Liberals were defeated by the NDP in the 1990 provincial election, and Polsinelli lost his seat to NDP candidate George Mammoliti by 1,619 votes.Six weeks after his defeat, he was appointed to North York council to fill the seat vacated by Anthony Perruzza who was elected as an NDP member of the provincial government.He did not seek re-election in the 1991 municipal election.