"If I didn't think I was the right person, leading the right team, I would not be standing here."
Gordon Brown is waiting to see whether his limited cabinet reshuffle has served to quell unrest among Labour MPs after a tumultuous week for the party.
The prime minister responded to a string of ministerial resignations and a "painful" English elections drubbing by vowing: "I will not walk away."
Labour is bracing itself for Sunday's European election results.
Culture Secretary Ben Bradshaw said he hoped Labour activists would give MPs the message to "rally round" Mr Brown.
Mr Bradshaw, promoted in the reshuffle, said the PM was the best man to lead the UK during the current economic crisis.
And veteran Labour MP Tony Wright told BBC Radio 4's Today: "People are saying to us 'stop the infighting, stop the caballing, stop the organising against the leadership'."
He added that although Mr Brown might be a "clunky communicator" he was "a towering figure who has brought the world through the worst financial crisis for 60 years".
Colleagues have also been defending Mr Brown after departing Europe Minister Caroline Flint accused him of sexism.
NEW JOBS: Alan Johnson - Home secretary Andy Burnham - Health Yvette Cooper - Work and pensions Bob Ainsworth - Defence John Denham - Communities Liam Byrne - Chief Secretary to the Treasury Ben Bradshaw - Culture Lord Adonis - Transport Peter Hain - Welsh Office Glenys Kinnock - Europe (non-Cabinet post) Sir Alan Sugar - Enterprise tsar (non-Cabinet post)
QUITTING: John Hutton James Purnell Jacqui Smith Hazel Blears Geoff Hoon Paul Murphy Caroline Flint(Minister of State) Tony McNulty(Minister of State) Margaret Beckett(Minister of State)
Mr Brown also chose to expand Lord Mandelson's business role, giving him responsibility for higher education and training and the title of First Secretary of State.
Commentators have described him as effectively deputy prime minister.
BBC political correspondent Ben Wright said Mr Brown had kept his would-be challengers "on side".
But he added: "The pressure on the prime minister is huge and the mood in the Labour party is demoralised and volatile."
Speculation about Mr Brown's future continued as Labour MP Ian Gibson said he was standing down to force a by-election in Norwich North adding that the prime minister's days were "close to being numbered".
Former arts minister Mark Fisher joined those calling on Mr Brown to go.
Labour lost control of its four remaining English county councils on Thursday, with BBC projections putting the party's share of the national vote at a general election at a record low of 23%.
Wyn Grant, professor of politics at the University of Warwick, said he expected the European election results to bring "more bad news" on Sunday.
Mr Brown has seen off the ministerial revolt and it is now up to backbench Labour MPs to decide whether they accept that verdict or conclude that their weakened leader should be finished off.
The Blairite former cabinet minister Stephen Byers said: "On Monday Labour MPs will be considering a very important question - is Gordon Brown a winner or is Gordon Brown a loser?"
For the Conservatives, shadow communities and local government secretary Caroline Spelman, told BBC Radio 4's Today: "What people want is a General Election. They want a fresh start. They want a leader who can lead.
"He may have shuffled the pack yesterday but I think some of the cards are a little on the dog-eared side."
Liberal Democrats Home Affairs spokesman Chris Huhne said losing six cabinet ministers in three days had left the government in an "unbelievable shambles".
"This is an extraordinary situation when people are worried about their jobs, the economy, the state of their homes.
"We are getting no leadership from the government whatsoever," he said.
And, in a sign of the continuing febrile atmosphere Gordon Brown was forced to defend his expenses again over suggestions in the Daily Telegraph he claimed for electricity bills and service charges on two properties between 2005 and 2007.
A Number 10 spokesman insisted Mr Brown had complied with the rules at all times, a fact backed up by the Commons authorities, but he had agreed to repay about £180 "for the avoidance of doubt".
* There will be a Newsnight special: Brown on the Brink on BBC Two at 1930 BST on Saturday
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