Nigel Farage predicted that Lib Dem leader Nick Clegg will be ousted before next year's general election.
Mr Farage told BBC Radio 4's Today programme: "Nick Clegg's position clearly is very vulnerable indeed. I'd be very surprised if he led the Lib Dems into the next election.
"They have gone down to one seat and they've been beaten by the Greens in a national election, so I don't think the Lib Dems will stick with that."
Cable said he had no knowledge of the 'reprehensible' polls leaked by Lord Oakeshott on Nick Clegg's leadership.
The Liberal Democrat peer is taking a leave of absence from the Lords and resigning from the party, but is he the 'busted flush' some think?
Read the full statement from Lord Oakeshott on why he is resigning from the Liberal Democrats.