Mary Creagh has quit the Labour leadership race - and urged the eventual winner to pursue a more pro-business approach than Ed Miliband.
The shadow international development secretary has abandoned her bid for the top job after attracting the formal backing of only nine fellow MPs.
Nominations close on Monday and so far only Andy Burnham, Yvette Cooper and Liz Kendall have secured the 35 signatures needed to guarantee a place on the ballot paper.
Jeremy Corbyn, the standard bearer for the left of the party, has so far reached 18.
Ms Creagh indicated that she would not nominate any of her rivals. She delivered a stinging analysis of Mr Miliband's stance, saying: "Labour cannot be the party of working people and then disapprove when some working people do very well for themselves and create new businesses, jobs and wealth."
The Labour leader faced a string of bitter attacks from bosses of major firms during the general election campaign and Ms Creagh said that she had been censured by the party leader for alerting bus company chiefs as a courtesy to the party's plans to increase regulation.
"I was told we wanted to 'pick a fight' with them, to show Labour was tackling vested interests. I was dismayed. Bus subsidy was a complex area and if we wanted reform without transport chaos, we would have to work with the companies, not against them," she wrote.
"Is the Labour party having a nervous breakdown?"