Nick Clegg may end up losing his seat at the 2015 general election, a new internal poll leaked to the Guardian suggests.
The Deputy Prime Minister's constituency of Sheffield Hallam should be among the safest Lib Dem seats in the country, with a majority of over 15,000.
However the survey from pollsters ICM, commissioned by a party supporter, suggests Mr Clegg could lose the seat to Labour, who only came third in 2010.
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.