Question: When did the politician who represented the electoral district in Sydney's West resign from his political party?
Facts:
Electoral district of Auburn is an electoral district of the Legislative Assembly of the Australian state of New South Wales in Sydney's Wes
Electoral district of Auburn is represented by Luke Foley
Luke Foley was a member of the New South Wales Legislative Council until his resignation to contest the Legislative Assembly seat of Auburn at the 2015 New South Wales election.
Answer: 2015