David Cameron has said that he only judges Vince Cable by "the results he delivers", as he does all his ministers.
The Prime Minister was speaking in the wake of a failed leadership coup against his Liberal Democrat Deputy PM Nick Clegg.
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.