John Martin McDonnell (born 8 September 1951) is a British Labour Party politician who served as Shadow Chancellor of the Exchequer from 2015 to 2020. He has been the Member of Parliament (MP) for Hayes and Harlington since 1997.

He formerly had the Labour whip withdrawn and was suspended from the party on 23 July 2024 as a result of voting to scrap the two child benefit cap. McDonnell is on the political left and a member of the Socialist Campaign Group.

He stood for the position of Labour Party leader following Tony Blair's resignation in 2007, but failed to reach the required number of nominations. He was a candidate for the party leadership again in 2010 following Gordon Brown's resignation after Labour's electoral defeat, but withdrew in favour of Diane Abbott, feeling that he would be unable to secure enough nominations.

Alongside Jeremy Corbyn, McDonnell has been seen as a major figure on the left wing of the party. After being elected Labour leader in 2015, Corbyn appointed McDonnell to his Shadow Cabinet as Shadow Chancellor of the Exchequer. As Shadow Chancellor, McDonnell pledged to increase spending on infrastructure and research, describing his vision for the economy as "socialism with an iPad".

Early life McDonnell was born in Liverpool to a family with an Irish Catholic background. His father, Bob, was a docker who also served as a sergeant in the Sherwood Foresters during World War II, whilst his mother Elsie worked as a cleaner. He moved with his family to his mother's hometown, Great Yarmouth in Norfolk, when he was very young as his father was unable to find work at the docks; his father became a bus driver and was a branch secretary of the Transport and General Workers' Union and his mother worked for British Home Stores. McDonnell attended Great Yarmouth Grammar School. McDonnell received a Local Authority grant to attend St Joseph's College, Ipswich, a Roman Catholic boarding fee-paying independent school for boys (now co-educational). McDonnell is now irreligious, but refers to himself as a "cultural Catholic" and is a regular churchgoer.

McDonnell failed his A-levels at grammar school, partly due to holding down part-time jobs in bars and a bingo hall. Upon leaving education, McDonnell held a series of unskilled jobs. After marrying his first wife, he returned to A-level studies at night school at Burnley Technical College, and at the age of 23, he moved to Hayes in Greater London, attended Brunel University, and earned a bachelor's degree in government and politics. During this period, he helped his wife run a small children's home in Hayes, and was active on behalf of his local community and for National Union of Public Employees. After completing his master's degree in politics and sociology at Birkbeck, University of London, he became a researcher and official with the National Union of Mineworkers from 1977 to 1978, and later the Trades Union Congress from 1978 until 1982. From 1985 to 1987, McDonnell was head of the policy unit at Camden Borough Council, then chief executive of the Association of London Authorities from 1987 to 1995, and the Association of London Government from 1995 until 1997.

Greater London Council (1981–1986) In 1981, McDonnell was elected to the Greater London Council (GLC) as the member for Hayes and Harlington. He became the GLC's chair of finance and deputy leader to Ken Livingstone, who described him as having an "absolute grasp for detail and every year he produced a balanced budget, no borrowing". He was sacked by Livingstone in 1985 over the strategy to oppose rate-capping—Prime Minister Margaret Thatcher's government had capped council rates (now called council tax), an action which the GLC had claimed, based on figures calculated by McDonnell, would lead to £135 million in cuts. However, Livingstone claimed in his autobiography to have found that the authority could actually still increase spending and cap the rates; Livingstone said that McDonnell had 'exaggerated' spending figures to support his case that the GLC had to ignore the rates cap, and that he confronted McDonnell, saying "If these figures are right we're going to look like the biggest fucking liars since Goebbels." McDonnell described Livingstone's account as "complete fiction".

In an interview with Ronan Bennett for The Guardian newspaper, McDonnell described his role during this time as being "to translate policies into concrete realities on the ground." He further discussed his performance by indicating, "I was a fairly hard-nosed administrator. We set in train policies for which we were attacked from all sides but are now accepted as mainstream: large-scale investment in public services; raising the issue of Ireland and arguing for a dialogue for peace; equal opportunities; police accountability. We set up a women's committee, an ethnic minorities committee."

After the GLC (1986–1997) Following the abolition of the GLC in 1986, McDonnell was employed as head of the policy unit at Camden London Borough Council. In 1987, he became Chief Executive of the Association of London Authorities (eventually the Association of London Government), where he represented all the London boroughs in their relations with central government and Europe. Having previously unsuccessfully contested Hampstead and Highgate in 1983, McDonnell fought for his home constituency of Hayes and Harlington at the 1992 general election, but lost by 53 votes, after three recounts, to the Conservative incumbent, Terry Dicks. During the campaign, Dicks sued for libel over critical material in McDonnell's campaign leaflets; McDonnell settled and paid Dicks damages of £15,000 plus legal costs of £55,000. McDonnell would later refer to Dicks as a 'stain' on the character of the House of Commons and a stain on the Conservative Party, and a 'malignant creature' during his maiden parliamentary speech.

Parliamentary backbencher (1997–2015) When Terry Dicks then stood down, McDonnell became the MP for Hayes and Harlington at the 1997 general election, with 62 per cent of the vote and a majority of over 14,000. He made his maiden speech in the House of Commons on 6 June 1997, where he notably launched a scathing attack against his predecessor, against parliamentary tradition. He has been involved in several local community campaigns, including one opposing the expansion of Heathrow Airport and its impact on local communities. He opposed New Labour policies of the Iraq War, foundation hospitals, student top-up fees, trust schools and anti-terror laws. When Ken Livingstone was elected Mayor of London, as an independent in 2000, he appointed McDonnell to his cabinet with responsibility for local government in London.

Iraq War McDonnell voted against the 2003 Iraq War, stating in 2007: In October 2006, McDonnell was one of 12 Labour MPs to back Plaid Cymru and the Scottish National Party's call for a parliamentary inquiry into the war in Iraq.

Irish Republican Army In May 2003, he made controversial comments about the Provisional Irish Republican Army (IRA), saying:

Threatened with expulsion from the Labour Party, he went on to offer a rationale for his comments in an article written for The Guardian in June 2003 ("Expulsion would be an odd reward for telling hard truths"), stating:

According to a report in The Times published in November 2015, McDonnell had made similar comments at a Labour Committee on Ireland meeting in 1985, before the start of the Northern Ireland peace process. The Deptford Mercury asserted at the time that McDonnell had suggested there was a role for "the ballot, the bullet and the bomb" in achieving a United Ireland, and joked about "kneecapping" the "gutless wimp" Labour councillors who had declined to join the meeting.

In September 2015, McDonnell apologised on the BBC television programme Question Time for any offence caused by his remarks on the IRA. He said that his remarks in 2003 had been an attempt to persuade republicans to support the peace process and to afford the IRA the opportunity to disarm without humiliation stating: "There was a real risk of the Republican movement splitting and some of them continuing the armed process."

In his study at Hayes, McDonnell has a plaque presented to him by Gerry Kelly dedicated to the "H-Block Martyrs 1981", referring to those who died during the 1981 Irish hunger strike. A spokesman for McDonnell said the plaque "merely commemorates the peaceful protest in prison, not the prior actions of those involved".

Groups and campaigns in Parliament McDonnell is a leading member of several all-party groups within Parliament, including groups representing individual trade unions, such as the Public and Commercial Services Union (PCS), the National Union of Rail, Maritime and Transport Workers (RMT), the Fire Brigades Union (FBU), the National Union of Journalists (NUJ) and justice unions such as NAPO. He is also a leading member of groups on a wide range of issues such as Britain's Irish community, the Punjabi community, endometriosis, and Kenya. McDonnell is a member of the Labour Land Campaign, which advocates introducing a land value tax.Labour Land Campaign website, labourland.org. Retrieved 21 October 2015.

McDonnell chairs the Labour Representation Committee (LRC), a left-wing group of Labour activists, local parties, trade unions and MPs that campaigns for the adoption of a raft of socialist policies by the Labour Government. The group was founded on Saturday, 3 July 2004, and currently has more than 800 members and 90 affiliates. He also chairs the Public Services Not Private Profit, an anti-privatisation campaign that brings together sixteen trade unions and several campaigning organisations, such as the World Development Movement, Defend Council Housing and the National Pensioners Convention. An early day motion in support of the campaign attracted more than ninety MPs. The campaign held a mass rally and lobby of Parliament on 27 June 2006, which was attended by more than 2,000 trade unionists.

Economic policy In 2006, McDonnell said that "Marx, Lenin and Trotsky" were his "most significant" intellectual influences. Footage emerged of McDonnell in 2013 talking about the 2008 financial crisis and stating, "I've been waiting for this for a generation! We've got to demand systemic change. Look, I'm straight, I'm honest with people: I'm a Marxist." He was accused of celebrating the 2008 financial crisis; McDonnell denied the allegation and claimed he was joking. During an interview with Andrew Marr when the footage was played and McDonnell was asked, "Are you a Marxist?", he replied: "I believe there's a lot to learn from reading Kapital, yes of course there is, and that's been recommended not just by me but many others, mainstream economists as well." In 2018, McDonnell attended the Marx 200 conference, where he said, "Marxism is about the freedom of spirit, the development of life chances, the enhancement of democracy." In 2019, McDonnell stated during an interview that Marx's Kapital is "one of the important analyses of the modern capitalist system".

Public services McDonnell has consistently opposed the privatisation of public services and chaired the Public Services not Private Profit Campaign launched in 2006 and supported by sixteen trade unions linking up with students, pensioners, health campaigners and the World Development Movement.