Labour leadership outsider Liz Kendall has refused to bow to pressure and remove herself from the contest to help defeat Jeremy Corbyn.
Asked by ITV News Political Correspondent Carl Dinnen whether she would consider standing down after polls showed her in last place, Kendall replied: "Never... you can't stop fighting for what you believe in."
The MP for Leicester West said that only she and Corbyn were the only candidates "making a different case from where Labour's been at the last two elections".
However, she said a Corbyn victory would turn Labour into an "unelectable party of protest".
Liz Kendall has said she will not pull out of the Labour leadership race to help block the challenge from Jeremy Corbyn.
The shadow care minister, currently a distant fourth, is said to be under pressure to quit to allow the right of the party to shore up the vote for one of her rivals - Andy Burnham and Yvette Cooper.
However an aide to Ms Kendall - seen as the Blairites' favourite - insisted that she had no intention of standing aside.
They said Mr Burnham and Ms Cooper had only themselves to blame for the growing bandwagon apparently building behind Mr Corbyn.
"It's not going to happen. This briefing is nonsense because in a preference vote it doesn't matter how many candidates there are," a spokesman said.
Labour leadership hopeful Liz Kendall has defended the party's interim leader, Harriet Harman after others attacked her for endorsing key Tory benefit cuts.
Liz Kendall said it was essential that the party showed that it had changed if was to regain the trust of voters.
She said "People said to us 'We don't trust you on the money, we don't trust you on welfare reform.'
If we are going to oppose things we have to put something else in its place, because if we carry on making the same arguments we have done over the last five years we will get the same result.
"We have to put forward a different credible alternative and Harriet was absolutely right to say that."
Labour leadership candidate Liz Kendall has said the policy of removing tax credits from migrant workers is "definitely something we should look at".
Kendall told the BBC's Andrew Marr Show: "We do have to deal with the issue of people who come here to work.
"They must be working and not claiming benefits. But this is about something much bigger - it is about the future of our country and our place in the world.
"David Cameron should be focusing on what is in Britain's national interest and our place in the world, not on internal party politics."
Planned operations on the NHS are "going backwards" because Tory mismanagement has lead to more emergency admissions, according to the shadow care minister.
Liz Kendall said the main challenge for the NHS was to "help keep people fit and healthy and living at home" so hospital admissions could be kept down.
Labour's shadow health minister Liz Kendall has raised concerns about whether the measures being unveiled today will be possible to enforce, and will save money: