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Vince Cable's been stripped of some of his powers after telling undercover reporters he'd "declared war" on Rupert Murdoch. He also said he could bring down the coalition.

Is this the behaviour you'd expect of a cabinet minister?

Today there are more revelations. Three other Lib Dem ministers are recorded saying they are unhappy with government policy. Michael Moore, Ed Davey and Steve Webb are critical of changes to benefits and student tuition fees. Should this be the behaviour of a party in government? Are the Lib Dems fit for office?

Nicky Campbell takes your calls, and gets reaction from former Lib Dem MP Lembit Opik and Shane Greer from Total Politics magazine.