In mid-2012, following the defection of Peter Slipper from the Liberals to become an independent MP and Speaker of the House of Representatives, Brough announced that he was seeking LNP preselection for the seat of Fisher for the 2013 federal election. On 29 July 2012, it was announced that had won the preselection for the seat, despite criticism over his contact with James Ashby. Ashby had been an adviser to Slipper who had made accusation of sexual harassment. Justice Steve Rares found that Brough had acted with Ashby and another Slipper staffer, Karen Doane, in abusing the judicial process for the "purpose of causing significant public, reputational and political damage to Mr Slipper". On 9 October 2012, Slipper resigned as Speaker following revelations of mobile phone text messages he had sent to Ashby. In an early 2014 appeal ruling the full bench of the Federal Court found that Justice Rares had 'no basis to conclude that Brough was part of any combination with anyone in respect to the commencement of these proceedings with the predominant purpose of damaging Slipper in the way alleged or at all,' and that there was 'nothing untoward about those matters'.