Promising an in/out vote would shift the debate back onto Tory territory and could wreck a future Miliband premiership.
The shadow chancellor rejects claims that he lacks enthusiasm for Miliband's agenda and declares his support for "a different kind of economy".
With Labour uncertain of winning a majority and the Deputy PM certain to be around in May 2015, Miliband and Balls can no longer afford to treat him as a barrier to an agreement.
Part of the problem is that even Labour MPs find their boss remote.
The shadow chancellor on why he could go into coalition with Clegg, why airport expansion in the UK is essential for growth and why history will judge Gordon Brown kindly.
The shadow chancellor says for the first time that he could work with the Lib Dem leader, supports airport expansion and says history will "paint a different picture" of Gordon Brown.
The MP for Wythenshawe and Sale East has passed away in hospital.
Many in the party would like Miliband to pledge to raise the minimum wage to the level of the living wage, but a large rise in the former is more likely.
Having distanced himself from neo-liberalism, Ed Miliband needs to redefine British social democracy as more participative, more socially liberal, and more community-focused.
Twenty years ago, John Prescott persuaded sceptical delegates to back John Smith's trade union reforms, but who will fulfil this role for Miliband at March's special conference?