Many politicians and commentators from across the political spectrum have welcomed the addition of Jeremy Corbyn to the Labour leadership race, standing on a "clear anti-austerity platform".
As Corbyn announced his candidacy on Wednesday, he said:
This decision to stand is in response to an overwhelming call by Labour members who want to see a broader range of candidates and a thorough debate about the future of the party. I am standing to give Labour party members a voice in this debate.
In the first day on his campaign to muster the necessary support of 35 MPs, Corbyn has been backed by three: Jon Trickett, Clive Lewis and John McDonnell.
Upon announcing his support for Corbyn, Lewis said that the debate required greater "depth and breadth".
Yes I'm supporting @jeremycorbyn. Our membership needs a broad debate that ensures the depth and breadth of our parties views are engaged— Clive Lewis (@labourlewis) June 3, 2015
Among his other supporters was Ken Livingstone, who said that Corbyn's record on opposing the Iraq war and his links to the unions made him a good candidate.
I am delighted that Jeremy Corbyn is seeking to run for leader. For the union link, anti-war, internationalist, anti-racist, anti-austerity— Ken Livingstone (@ken4london) June 4, 2015
Owen Jones, left-wing columnist, said that Corbyn needed to be nominated for the ballot in order to have a "genuine leadership debate about policy".
Want a Labour contest where candidates basically agree, or a real debate about policy? Please encourage Labour MPs to nominate @jeremycorbyn— Owen Jones (@OwenJones84) June 3, 2015
Some on the right of politics also announced their support for Corbyn. Ukip MP Douglas Carswell urged people to "please" let Corbyn win - or "failing that, Andy".
Andy Burnham and Jeremy Corbyn are seen to be the more pro-union candidates in the tight race. Carswell used the hashtag #DisplaceLabour in his tweet, implying that he believed that another leader to the left of the party would make them unelectable.