Support for Liberal Democrats has plunged to just 12 per cent - half the level the party secured in the General Election - according to a poll released today.
The YouGov survey for the Sunday Times also recorded a steep nosedive in the popularity of the party's leader Nick Clegg since he became Deputy Prime Minister by taking the Lib Dems into coalition Government with the Conservatives.
Mr Clegg's personal satisfaction rating was eight points, compared to the spectacular 72 points he achieved in the wake of the first televised leaders' debate during the election campaign.
Today's poll suggested that Tories have not suffered in the same way from going into coalition.
David Cameron's party were up five points since the General Election on 42 per cent, with Labour gaining ground on them - up eight points since the Election on 38 per cent.
The Lib Dems rating was half the 24 per cent the party won in the election and the lowest since October 2007, when Sir Menzies Campbell was forced out as leader.
The poll came after Mr Clegg admitted in a TV documentary that he changed his mind about the need for spending cuts before the election without making his shift public, and after questions were raised over whether he misled Mr Cameron about the offers Labour had made him on electoral reform.
Signs of unrest have also emerged within his party over the coalition's position on issues like immigration, schools and university tuition fees.
:: YouGov questioned 1,885 voters online on July 29 and 30.Reuse content