Last night Owen Smith, ex-shadow secretary for work and pensions was said to have made a decision to launch his own leadership bid, as early as today.
"I want to ensure our country can be healed after the awful shock that Brexit is going to inflict on it. I am a practical socialist driven by a strong set of values".
She argued despite his principles, the party under Corbyn was not "communicating with our voters" and stressed her northern working class roots as well as her experience with "metropolitan things".
"I'm a gay woman - I know the difference between hope and fear".
Mr. Corbyn won the leadership with a huge mandate from party members just ten months ago.
Mr Smith said: "I am not prepared to stand by and see our party split".
Eagle had earlier called for people to join the party to attract more votes and topple Corbyn, saying that she could not take on the task of challenging the current party leader alone.
"I will now ask the chair of the National Executive Committee to convene a meeting to confirm arrangements for an election".
BBC News reports that there is a dispute within the party over whether Jeremy Corbyn should be automatically allowed on the ballot in the upcoming leadership election.
In an interview on Sunday on the Andrew Marr Show, Mr. Corbyn was resolute that he would fight to be elected again, even hinting at a legal challenge if he is kept off of the ballot paper.
"I'm not here for a Labour party that just takes part".
Its membership has grown from 900 before June 24 to 1,200, according to Paul Davies. "The country needs Labour as an alternative government and we need Angela as our leader".
However, critics have pointed to her lack of support within her consticuency party members, some of whom have threatened a vote of no confidence in the MP. "Well, if so, then our members. that's democracy".
She told Today: "It's quite clear to me from the rules that the section "any nomination" refers to potential challengers".
If they persist in abandoning the field of battle against the Tories when they should be uniting behind the leadership's principled anti-austerity positions, they should be told their fortune, in no uncertain terms, by the entire labour movement.
But Victoria Honeyman, an expert on British politics at the University of Leeds, said his support comes entirely from people who already agree with him.
Corbyn is adamant that the leader should automatically be on the ballot.
Easington MP Grahame Morris has reiterated his support for Jeremy Corbyn to continue as the Labour leader after Angela Eagle launched her campaign to head up the party. She said: "He has been hiding behind a door not talking to his MPs - that's not leadership.
Because, unless we can win an election, we can achieve absolutely nothing".
"I don't think that's a great legacy", she told Sky News. I'm here to win.
But nearly simultaneously, the party's election chief, the MP Jon Trickett, urged his colleagues to begin preparations for a general election, as it became clear that Home Secretary Theresa May is likely to become prime minister within days. "Particularly if you are a leader, you have to be able to talk to people".
Mr Corbyn has faced a challenge to his authority as Labour leader after losing a no-confidence vote of Labour MPs, unhappy with his performance during the European Union referendum campaign.