The proportion of voters who think Ed Miliband is doing a good job has slumped over the summer, according to a poll.
Research by ICM for the Sunday Telegraph found just 21% thought the Labour leader was performing well - down from 28% in April. More than half - 51% - said he was doing badly.
Mr Miliband's personal figures were worse than those for David Cameron - who was praised by 32% - but better than Nick Clegg's. Only 17% said the Liberal Democrat leader was doing a good job.
However, the poll found that most people still believed Labour would win if a general election was held tomorrow.
Some 32% thought the party would emerge victorious, while 30% backed the Tories and 16% the Lib Dems.
ICM director Martin Boon compared Mr Miliband's leadership to Iain Duncan Smith's spell in charge of the Conservatives.
"Ed Miliband is not in a good place. Only a fifth of voters are satisfied with his performance," he said. "It's difficult to imagine that things could be any worse for him, or indeed how he can succeed in turning the public around.
"He is becoming Labour's IDS and if it carries on like this it's hard not to think that we'll be seeing Conservative polling leads very soon."
:: ICM surveyed 2,013 people online between August 21 and August 23.