Nick Clegg has played down suggestions that Vince Cable knew about a controversial poll commissioned by Lord Oakeshott in the Deputy Prime Minister's constituency.
The peer, who has now resigned from the Liberal Democrats, privately commissioned surveys in several constituencies that showed a collapse in support for the party since 2010.
But Mr Clegg insisted the Business Secretary, once seen as an ally of Lord Oakeshott, was unaware of a survey in the Lib Dem leader's Sheffield Hallam seat.
"Vince Cable clearly didn't know a thing about a poll being conducted in Sheffield," the Deputy Prime Minister told BBC Radio Sheffield.
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.