He was a vocal supporter of the unsuccessful Britain Stronger in Europe and People's Vote campaigns for the UK to remain in the European Union, and attracted international attention for his Twitter arguments with United States President Donald Trump.

Sadiq Aman Khan[8] was born on 8 October 1970 at St George's Hospital in Tooting, South London, to a working-class Sunni Muslim-Muhajir family.

[34] In 2003, Tooting Constituency Labour Party decided to open its parliamentary selection to all interested candidates, including the incumbent MP since 1974, Tom Cox.

Khan was one of the Labour MPs who led the successful opposition to Prime Minister Tony Blair's proposed introduction of 90 days' detention without charge for those suspected of terrorism offences.

The report concluded that the doctrine did not apply because it affected only bugging requiring approval by the Home Secretary, while in Khan's case the monitoring was authorised by a senior police officer.

[37] On Prime Minister Gordon Brown's Cabinet reshuffle of 3 October 2008, Khan was appointed Parliamentary Under-Secretary of State for Communities and Local Government.

[48] In the House of Commons in January 2009, Khan criticised Pope Benedict XVI for the rehabilitation of Bishop Richard Williamson following his remarks about the Holocaust, a move he described as "highly unsavoury" and of "great concern".

The first incident concerned letters sent out before the 2010 General Election which were ruled to have the "unintentional effect of promoting his return to office", the second a £2,550 repayment for Christmas, Eid, and birthday cards for constituents, dating back to 2006.

[72] Khan was also tasked with overseeing Labour's campaign for the 2014 London local elections,[53] in which the party advanced its control in the city, gaining hold of twenty of the thirty-two boroughs.

[80] On 9 May 2016, Khan resigned as an MP by his appointment to the ancient office of Crown Steward and Bailiff of The Three Chiltern Hundreds, a customary practice in the UK.

[87] His first act as mayor was his appearance at a Holocaust memorial ceremony in a rugby stadium in North London,[88] although due to delays with the results of the election, he officially took office on 9 May.

[92] He also received the backing of the Labour-affiliated GMB and Unite unions,[93] and the nomination of 44 of Labour's 73 parliamentary constituent parties in London, leaving him as one of the top two contenders.

[94] A YouGov poll for LBC suggested that while the other main contender to be the Labour nominee, Tessa Jowell, would defeat Goldsmith in a mayoral election, Khan would not.

[125] In August 2016, Khan declared his support for Owen Smith's failed bid to oust Jeremy Corbyn as Leader of the Labour Party.

[126] On 8 January 2021, Khan announced a planned council tax rise of 9.5% to help fund policing and free transport for pensioners and schoolchildren in London.

[128] In the buildup to the referendum on the UK's continuing membership of the European Union (EU), Khan was a vocal supporter of the "Remain" camp.

[132] After the murder of MP Jo Cox during the campaign, Khan called for the country to "pause and reflect" on the manner in which the Leave and Remain camps had been approaching the debate, stating that it had been marred by a "climate of hatred, of poison, of negativity, of cynicism".

[133] Following the success of the "Leave" vote, Khan insisted that all EU citizens living in London were welcome in the city and that he was grateful for the contribution that they made to it.

[149][150] He then appeared at a Trafalgar Square celebration of Eid al-Fitr, endorsing religious freedom and lambasting "criminals who do bad things and use the name of Islam to justify what they do".

[162][163] That evening the statue of Robert Milligan, a merchant and slave trader, outside the Museum of London Docklands was removed by the local authority and the Canal & River Trust.

[189] Without an agreement with the government, deputy mayor for transport Heidi Alexander said TfL might have to issue a "Section 114 notice" – the equivalent of a public body going bust.

[191] Transport Secretary Grant Shapps MP blamed Khan for the "poor condition of TfL's financial position" during his four years as Mayor.

[217] Since Khan became Mayor, overall crime rates in London increased in every reporting year to 2020, before falling dramatically during the Covid pandemic, and then slowly returning to 2019 levels by 2024.

[238] Khan condemned the plans for a protest march against Narendra Modi's government over India's treatment of Kashmir during the Hindu festival of Deepavali.

[242] Journalist Dave Hill has said that Khan was "savvy, streetwise and not averse to a scrap",[243] whilst also describing him as having a "joshing, livewire off-stage personality" which differed from the formal image he often projected while onstage.

[246] Another rival in the 2016 Mayoral campaign, George Galloway of the Respect Party, referred to Khan as a "flip-flop merchant" and a "product of the Blairite machine".

[249] Upon arrival, Trump responded on Twitter by calling him a "stone-cold loser" and compared him to another mayor he also targeted, Bill de Blasio.

[159][160] On 13 October 2023, during the Israel–Hamas war, Khan urged Israel to exercise restraint, arguing that a blockade of the Gaza Strip could lead to "suffering" among Palestinian civilians.

[252] He was criticised by Jewish figures, including the UK Chief Rabbi Ephraim Mirvis, who stated that "a ceasefire now would be an irresponsible stepping stone to yet more Hamas terrorist brutality".

Khan apologised for the remarks a day after the footage was released, stating: "At times it is clear to me, and others, that as a mayor of London of Islamic faith, I am held to a different standard and that can be frustrating – particularly during a divisive election campaign.