In November 2011, he resigned from the council, enabling fellow Sinn Féin member James McKeown to take his place.

[10] Just over a week after gaining election, he received a death threat from a group claiming to be called the 'Loyalist Action Force'.

[11] McMullan spoke about a family that had been the target of several racist attacks in Glenarm, saying, "There has been a petrol bomb thrown at the house and there has been another occasion when acid was poured over their vehicle.

[19] McMullan attempted to regain his former seat at the 2022 Assembly election, where he was eliminated on the fourth count with 3,675 first-preference votes (9.1%).

[21] McMullan was pushed into fifth place by Matthew Warwick of the Traditional Unionist Voice (TUV) at the 2024 general election, polling 2,986 votes (7.5%).