The party would perform no better under Cable, and Lib Dem voters and the party's 2010 supporters want him to stay.
The Lib Dem leader should seek a renewed mandate from his party.
Clegg is unwilling to fall on his sword and the party isn't prepared to force him out.
Vince Cable says the Lib Dem leader took a "gamble" by campaigning on Europe, while Lynne Featherstone says her party has lost its "humanity".
Cameron fears the collapse of the coalition. Labour fears a more popular centre-left leader.
The more parties, broadcasters and papers pile in, the greater the danger of a non-agreement.
It would enhance his bargaining power, while the Tories can remind him that they allowed a vote on AV.
The authoritative online alter ego of the deputy prime minister laid bare.
Rather than preparing for another hung parliament, Labour is focused on "crushing" Clegg's party.