A member of the Scottish National Party (SNP), she was a councillor in Stirling for Trossachs and Teith ward from 2017 to 2022.

[3] In June 2022 she apologised after being photographed holding the flag of the ultra-nationalist group Siol nan Gaidheal.

[4] Tweed was selected as the SNP's candidate for the Stirling constituency in the 2021 Scottish Parliament election.

[6] In February 2025, Tweed was reported to be on an all-female "hit list" of SNP MSPs that were to be asked to stand down from the Scottish Parliament to make room for ex-MPs who had lost their seats in the 2024 general election.

The alleged list was reported to have been drawn up at Stephen Flynn's direction by Aberdeenshire North and Moray East MP Seamus Logan.