The legal showdown between John Setka and Labor will culminate in the Supreme Court on Thursday as the construction union boss fights back against Opposition Leader Anthony Albanese’s push to expel him from the party.

The CFMMEU Victorian construction branch secretary has applied for an injunction against any move to turf him from the Labor Party.

John Setka and his wife Emma Walters arrive at Melbourne Magistrates Court. Credit:Jason South

Labor’s national executive was set to decide on Mr Setka’s expulsion next week after he was granted a 10-day extension to plead his case before party officials.

But he has since taken the matter to the Supreme Court, where it has been set down for a one-day hearing.