Tories are pushing the Prime Minister to consider how he could work with Salmond's party in a hung parliament.
Shadow chancellor says the Conservatives have blundered by admitting day-to-day spending will be reduced to its lowest level for more than 50 years.
Osborne has at least one big card left to play - but it might help the Conservatives less than they hope.
The low point in 2000 pre-dated the government's spending increases for health and education.
The shadow chancellor will unveil a full analysis of how the Tories' plans would hit public services.
The Conservatives' obsession with subsidising ownership neglects the UK's nine million private renters.
The Conservatives' failure to meet their pledge to reduce net migration to "tens of thousands" is one of the best things to have happened to the economy.
The proposed figure of £6.70 fails to meet the Chancellor's aim of restoring the minimum wage to its pre-recession value.
Cameron's promise creates a new dividing line with Labour and the Lib Dems, who would means-test some payments.
The new measure encourages the perception that the party is for some, not for all.