Andreas Weidinger has been active in the Young Conservatives (KU) for a number of years and was elected to the organisation's executive committee in 2014.
On 21 March 2016, news outlets reported the rise of division within the organisation caused by the expulsion of certain members leading up to its national council held during the weekend.[6][7][8] Weidinger, who at the event had been elected national chairman of the KU after Mikkel Ballegaard, had prior to the council himself been expelled from his local KU association of KU Copenhagen for backing the expulsions, which he stated were due to the members having "campaigned for other parties" as well as harsh rhetoric.[9][10][11] However, was eligible to become chairman as he was incorporated into another local KU association.[9] Among the expelled members were chairman of KU Vejle and future member of the Danish Parliament Mikkel Bjørn.[12][13][14]
In March 2018, he was succeeded by Andreas Storgaard Weidinger and won the 2017 national championship in debating at the Folkemøde on Bornholm.[15] In this connection, he was interviewed by the Danish newspaper Politiken where he described his ideological position as socially conservative.[16]
Weidinger first ran for public office at 2013 municipal elections in 2013, where he ran for Copenhagen City Council.[17] Although he with 358 personal votes was not elected, his campaign was praised in the newspaper Metroxpress, who awarded him the best candidate on social media.[18]
After his studies were completed, Weidinger moved to Gentofte and in 2017 stood in the municipal elections in Gentofte Municipality. Here he was elected to the municipal council with 598 personal votes, third most on the conservative list.[19][20] Here he became deputy chairman of the Elderly, Social and Health Committee and a member of the Children's Committee, the School Committee and the Business, Employment and Integration Committee.[1]