Warburton was Treasurer of Wells Conservative Association from 2009 to 2010 and its Political Deputy Chairman and Constituency Spokesperson from 2010 to 2012. In February 2013, he was selected as a parliamentary candidate for
Somerton and Frome, defeating
Ivan Massow. At the
2015 general election, he was elected with 53% of the vote – and, at 18.3%, with the largest constituency swing to the
Conservative Party – after
David Heath, who had held the seat for the Liberal Democrats since 1997, stepped down. In April 2016, Warburton was one of five Conservative MPs to rebel by voting against the Government
whip in favour of an
opposition amendment tabled by
Lord Dubs demanding that Britain take in vulnerable children from refugee camps in Calais and Dunkirk, which presaged an eventual Government
U-turn. He supported
Brexit in the
2016 referendum, Warburton sat on several
all-party parliamentary groups (APPGs) including the
British Council APPG, Chair of the APPG for Music, and vice-chair of both the APPG for Blockchain, and Small and Micro Business. He also sat on the
European Scrutiny Committee, and between 2016 and 2017 chaired the British Council's Building Resilience to Radicalisation Inquiry. Warburton was re-elected at the
2017 general election with an increased vote share of 57% and an increased majority of 22,906, and in January 2018 he was appointed
Parliamentary Private Secretary to the
Department for Education. Warburton employed his wife as a communications officer/personal assistant. He was listed in
Daily Telegraph and
Guardian articles in 2015 criticising the practice of MPs employing family members, on the grounds that it promotes
nepotism. Although MPs who were first elected in 2017 were banned from employing family members, the restriction was not retrospective – meaning that Warburton's employment of his wife was lawful. Following allegations of misconduct, Warburton formally
resigned from Parliament on 19 June 2023. Liberal Democrat
Sarah Dyke won Warburton's seat in the
by-election triggered by his resignation, replacing a 19,213 Conservative majority with one of 11,008 for her party in July of that year.
Withdrawal of whip In April 2022, he had the Conservative
whip withdrawn pending the outcome of an investigation by Parliament's
ICGS into allegations that he
sexually harassed three women, all of which were eventually dismissed or withdrawn. Suffering from severe shock and stress following the allegations, Warburton was admitted to a
psychiatric hospital. In November 2022 the
Parliamentary Commissioner for Standards found that Warburton had breached the MPs' code of conduct after failing to declare a £150,000 loan from Russian businessman Roman Joukovski. Warburton received the loan in August 2017, through a
Seychelles shell company, and said did not declare it because it was "entirely unconnected with either my role as an MP or any parliamentary activities". Warburton insisted that the loan had "in no way … influenced my words or actions as a Member". As the Commissioner,
Kathryn Stone, was satisfied the loan had not influenced Warburton, the breach was rectified upon Warburton's formal acknowledgement and apology to the commission. In January 2023, Warburton revealed his intention to seek re-election at the
2024 general election. The following month, a Sunday Times investigation claimed Warburton failed to disclose a £25,000 donation from a billionaire, to have used a forged document in an £800,000 mortgage application, and to have concealed an interest in a property firm. In response, Frome Town Council unanimously passed a vote of no confidence in Warburton, and in April, calls were made for Warburton to resign after a year of absence from parliament. On 17 June 2023, Warburton announced his intention to resign to the
Mail on Sunday, claiming that the parliamentary harassment watchdog denied him a fair hearing over claims he harassed two women. He admitted to taking
cocaine after drinking whisky with a third woman. After resigning, Warburton said that the
MeToo movement's "pendulum has swung too far" and that he wanted it to "swing back" to a "fair place". He apologised for using cocaine, but denied sexual misconduct. In July 2023, The Independent Expert Panel (IEP) of judges overturned both the Parliamentary Commissioner for Standards and the ICGS, ruling that "the allegation that the complaint was fabricated" and should be investigated by the parliamentary investigative authorities, after which the claimant withdrew all allegations against the then former MP. ==Philanthropy==