Len McCluskey has won the backing of most of the Unite union's officers, regions and executive members in his bid to be re-elected general secretary.
Nine out of Unite's 10 regions as well as the vast majority of officers, sectoral and regional committee chairmen and members of the union's executive support him.
McCluskey said: "I am deeply honoured to have received the overwhelming support of the people who give their time to build this great union and defend our members."
"Their vote of confidence in me is phenomenal."
McCluskey is being challenged by regional official Gerard Coyne and the election will be held in March and April.
In a series of social media posts, McCluskey described the Islington North MP as a "genuine, decent man fighting for a fairer Britain".Read the full story ›
Gerard Coyne is hoping to take over as general secretary of Unite, from Len McCluskey.Read the full story ›
Len McCluskey's rival to head Unite says the union's current boss meddles too much in Westminster politics.Read the full story ›
Unite leader Len McCluskey is stepping down and will seek re-election for a further term of office from next April, the union said.Read the full story ›
Len McCluskey, general secretary of Unite, has attacked his "old friend" Angela Eagle for leading a "squalid coup" and "cowardly attack" on Labour leader Jeremy Corbyn.
The leader of the country's biggest trade union said "powerful interests" were behind the "attempted political lynching" as he confirmed Unite "would stand by Jeremy".
He urged the party's overwhelming majority of rebellious MPs to "re-establish mutual respect and unity" in a speech that targeted Labour challenger Eagle directly.
Let me ask Angela Eagle, who I regard as an old friend, but who resigned as shadow business secretary, a question: did you give 30 seconds' thought as to how this would help the workers at Tata, fighting for a future made still more uncertain by Brexit? Or the oil and gas industry facing obliteration? Or have they been abandoned in their moment of need?
Our movement is divided - bitterly and unnecessarily. Jobs are in jeopardy and long-established rights could be under threat. Millions of working people are looking for urgent answers to the crisis engulfing us. Our members and many besides are looking for a way forward.
Just a year after being elected, a Government rudderless and to blame for dispatching the country, via an unprepared referendum, into a pit of uncertainty. How ironic that a manoeuvre designed to overcome Tory divisions has ended up creating the mother of all splits.
The leader of the UK's biggest trade union has said the country is 'riven' as a result of the EU referendum.Read the full story ›
Len McCluskey told ITV News that the trade unions can help broker a peace deal and reunite the party now the "coup has failed".Read the full story ›
Leaders of 10 unions say pulling out of the EU will allow the government to dismantle hard won workers' rights.Read the full story ›
Jim Murphy launched a broadside attack on Unite boss Len McCluskey as he announced he will resign as leader of the Scottish Labour party.
Mr Murphy said that while trade unionists were "a source of enormous strength and moral purpose" to Labour, the party should not be beholden "to one man."
One of the things about stepping down is that you can say things in public that so many people in the Labour party only say in private. So whether it's in Scotland and the contest to come across the UK. We cannot have our leaders selected - or de-selected - by the grudges and grievances of one prominent man.
The leader of the Scottish Labour party doesn't serve at the grace of Len McCluskey. And the next leader of the UK Labour party should not be picked by Len McCluskey.