On 8 January 2018, Caulfield was appointed vice-chair of the Conservative Party for Women; the appointment was criticised by women's rights groups, including the Women's Equality Party, because she had opposed a Ten Minute Rule bill in March 2017 which sought to allow abortion to term and for voting in 2015 with the government to oppose the removal of the so-called tampon tax, currently levied on female sanitary products as the UK can currently not zero rate VAT on these products while a member of the EU She resigned from this position on 10 July 2018 in protest at the Brexit strategy of the Prime Minister, Theresa May.