Phillips worked as UKIP's head of media for three years. She explained her reasons for joining the Conservative Party as her admiration for then Prime Minister
Theresa May's positions on Brexit, grammar schools,
fracking, and the infighting within UKIP. In May 2019, Phillips was announced as the
Brexit Party's candidate for the
South East England constituency in the
European parliamentary election. A
Green Party candidate also called
Alexandra Phillips stood in the same constituency. Both were elected. On 30 May 2019, less than a week after the election, Phillips appeared on the panel of the
BBC's weekly
Question Time. In July of the same year, Phillips admitted to working for
SCL Group, the parent company of
Cambridge Analytica, on Kenyan President
Uhuru Kenyatta's successful
2017 re-election campaign. She had previously denied working for Cambridge Analytica, but said the work she did was sub-contracted out by SCL. Cambridge Analytica was a British political consulting firm that closed in 2018 after being found to have
harvested millions of Facebook users' data without their consent for political advertising. In the European Parliament, Phillips was a member of the
Committee on Development, and was part of the
Delegation for relations with South Africa. However, on 11 November 2019, the Brexit Party announced that it would not stand in incumbent Conservative seats. The following day, Phillips announced that she would not be voting in the
general election as she had been "disenfranchised" by her party. Her term as MEP ended in January 2020 when the UK withdrew from the EU. In February 2023, she joined
Reform UK (successor to the Brexit Party) as a policy adviser to party leader
Richard Tice. ==Broadcasting career==