In the time elapsed between the 2016 election and the following federal election, many parliamentarians resigned from their seats, while some were disqualified by the High Court of Australia. The parliamentary eligibility crisis involving dual citizenship was responsible for a significant portion of these departures, although the cases of Barnaby Joyce and John Alexander only left brief vacancies due to their prompt returns in by-elections. Some individual parliamentarians also made an impact by changing their party membership or independent status.