A new poll shows a third of current Green supporters plan to vote for Miliband's party at the general election.
The red-blue duopoly that had held for decades fractured as insurgent tribes invaded the pitch.
The party has denied Osborne the chance to brand it irresponsible while also maintaining clear dividing lines on future cuts.
New leader emulates Tony Blair by announcing five new principles for the party's constitution, including commitment to patriotism.
Labour leader promises a new law banning employers from undercutting workers' wages and conditions by exploiting migrants.
Labour leader tells the New Statesman: "It hasn't happened in the past, I don't think it's going to happen in the future."
Labour leader attacks the Conservatives' plan for "a dramatic shrinking of the state and public services" to 1930s levels.
The two-against-one dynamic harms the Tories while exposing Clegg's party to the charge of hypocrisy.
Having concededed that a Labour government is superior to a Conservative one, the SNP will need to explain why it is working to prevent one.
The party's plans would allow it to shield services from the worst. But for fear of appearing profligate it won't tell voters.