On Saturday, the membership of the Labor Party voted between Avianna Aldridge and Julia Burns to determine which one would become the leader of the party and, consequently, the Leader of the Opposition. In the leadership election between former Foreign Secretary Aldridge and former Defence Secretary Burns, 64.9 per cent of the party membership sided with the former, who has been the parliamentary leader of the party since 2017. With the election being certified by the Electoral Commission, Aldridge's position as acting leader has been upgraded to Leader of the Labor Party. Upon being named the elected party leader, Aldridge designated Burns to become the deputy leader of the Labor Party. Despite being opponents in the election, the two candidates have been friends for years and were part of the so-called Big Three alongside Margaret Harrison in 2016.

With the Labor Party being in opposition for the first time since 2016, Aldridge stated that she will work as a part of the Alliance of Social Democrats to regain a majority in Parliament. After the 2019 general election, the Alliance consists of only three political parties: the Labor Party, the Populists of the Left, and the Socialist Party. Leading up to the election, The Greens and the Liberal Party chose not to renew their partnership with the Alliance, which Aldridge said was "detrimental" to the bloc's electoral performance in July. Populist Left leader Taeler Shaw and Socialist leader Amalia Rollins posted congratulatory messages to Aldridge on Stream. On the social media network, Shaw and Rollins reaffirmed their respective parties commitment to the Alliance and expressed hope that the bloc would return to government in the years to come.

While there were messages of congratulations from the political left, members of the governing bloc criticised the newly elected opposition leader. Chancellor Stella Kaufman gave a sarcastic message of congratulations before claiming that the Valkyrian people "will never elect" her to become Chancellor. Home Secretary Nicole Chancellor, who had previously served as Leader of the Opposition whilst being the Leader of The New Right, gave a speech in the National Assembly in which she said that the Labor Party has become "authoritarian in nature by only allowing supporters of the former Chancellor [Margaret Harrison] to thrive in their party". In contrast to the criticism coming from the other party leaders of the New Conservative Coalition, Foreign Secretary and Centrist Democratic leader Bradley Murphy simply congratulated the newly elected Leader of the Opposition before moving on to talk about foreign policy.

In her first post on Stream since leaving office, Harrison congratulated Aldridge and thanked Burns for her attempt to become the Leader of the Labor Party, calling them her "sisters".