Shadow health secretary Diane Abbott has told ITV's Good Morning Britain that Angela Eagle's support for the Iraq invasion and an increase in tuition fees show she is the "Empire Strikes Back" candidate against Jeremy Corbyn.
The Corbyn-supporting Abbott said her party's embattled leader must be on any leadership ballot as she played down talk of splits within the party and reports of political "Armageddon".
She joined Daily Mirror associate editor Kevin McGuire in doubting Eagle's success in a race with Mr Corbyn as the pair were questioned about the stature of a challenger who came fourth in a previous race for Labour's deputy leadership.
A Bridlington born MP is to officially launch her opposition to Jeremy Corbyn's leadership of the Labour Party today.
Former Shadow Business Secretary, Angela Eagle, says she wants to unite the party.
Mr Corbyn said he was disappointed over the leadership bid.
An East Yorkshire MP has said he intends to make a motion of contempt in the commons about former Prime Minister Tony Blair's decision to invade Iraq in 2003.
David Davis says Mr Blair mislead the Houses of commons on five different occasions over Weapons of Mass Destruction, the UN and threat levels. Should the motion be accepted, it could be debated before Parliament breaks for the summer.
Angela Eagle is to launch her Labour leadership contest on Monday, but how does it work?Read the full story ›
Ed Balls has told Peston on Sunday that Angela Eagle's leadership bid is "essential" as Jeremy Corbyn "can't do the job".
Sorry, this content isn't available on your device.
The former shadow chancellor said no one believed Corbyn could ever become prime minister.
"Frankly there is no message at all coming from Labour in the last two weeks about what the solutions to these big problems are," he told Robert Peston.
"There's got to be a change. It's not just necessary for Labour, I think it's necessary for the whole country.
"We need a strong opposition which believes it can form the next government and I'm afraid nobody thinks Jeremy Corbyn is going to be the prime minister of our country."
Labour leadership challenger Angela Eagle has told Peston on Sunday that she is fighting to save her party.Read the full story ›
The former deputy prime minister expressed his 'fullest apology' and said the decision made to go to war would live with him forever.Read the full story ›
The Welsh plant is likely to remain with its Indian owners but with jobs slashed under cost-cutting measures, ITV News has been told.Read the full story ›
Dominic Peacock was dismissed from the East Riding Council's Conservative groupRead the full story ›
Leeds North East MP Fabian Hamilton has resigned as Shadow Minister for Europe.
He was only appointed into the position last week. He is the 65th member of Jeremy Corbyn's frontbench to stand down.