The party's victory over the Tories in last night's council by-election in London offers even greater evidence of Lib Dem resilience.
When Conservatives, including Cameron, indicate their eagerness to be a little bit more like UKIP, all they do is give Nigel Farage the credit for setting the agenda.
If the Lib Dems benefit from an incumbency factor and UKIP splits the right-wing vote, the Tories will be the big losers.
The PM faces a backlash after the Lib Dems win the by-election and the Tories finish behind UKIP in third place.
Counting in the by-election continues as the Lib Dems say they have held the seat and predict that UKIP has beaten the Tories.
Scotland will not be forced to adopt a scorched earth approach to public spending if it leaves the UK.
The right-wing press is attempting to fool the public into believing that its opposition to green policies is based on robust evidence, rather than dogmatic ideology.
If the Chancellor wriggles free again, Balls’s detractors inside Labour will be howling for blood.
After claiming that Cameron was "scraping the barrel" by quoting the NS, the Labour leader was promptly reminded that it endorsed his leadership.
After previously suggesting that the Lib Dem chief executive resigned on "health grounds" alone, Clegg admits that concerns over his "inappropriate behaviour" were "in the background".
Health secretary promises to address "concerns" over Section 75 of the NHS bill after pressure from Lib Dems and Labour.
Five of the Lib Dems' seven female MPs hold seats among the party's 12 most vulnerable and none hold any of the 20 safest.
Ahead of the abolition of the 50p tax rate on 6 April, Labour looks again to paint the Tories as the party of the rich.
The loyalty of the trade unions to Labour, the rebirth of street politics and, in Scotland and Wales, Plaid Cymru and the SNP help explain why the party faces no effective challenge from the left.
A new poll from Lord Ashcroft putting the Lib Dems five points ahead in the by-election shows that local issues continue to take precedence over national ones.
Coalition was meant to be a journey to political maturity and professionalism. But it's amateur hour yet again.
If the party wants to attack Osborne on this territory, it needs to explain why and how it would borrow for growth.
Party candidate Jasper Gerard claims that allegations of sexual misconduct against Chris Rennard have been "blown out of all proportion".
The Huhne and Rennard scandals mean defeat will be portrayed as a humiliating set-back for Cameron.
The hundreds of activists stuffing envelopes in Eastleigh have been let down by the party's hopelessly inadequate response to the Rennard allegations five years ago.
Party president Tim Farron admits the Lib Dems "screwed up" as Clegg insists there is "nothing to hide".
The Chancellor chose to make Britain's AAA credit rating the ultimate test of economic stability. Tonight, he has been hoist with his own petard.
If England pulls Scotland out of the EU against its will, the independence cause could be re-energised.
Defeat in Eastleigh, a higher deficit, a triple-dip recession, poor local election results and the loss of Britain's AAA rating could prompt a new revolt by Tory MPs.
Nigel Farage's party would crave UK political representation to match that of the Greens.
No, but it’s struggling to catch up with the challenge of 2015.
Sixty per cent of workers agree that the minimum wage should be raised to the level of the living wage.
Anthony Seldon's New Statesman column provokes debate.
The Labour leader's commitment to "fairer", rather than "higher" taxes, suggests the party will not seek to significantly increase the overall tax burden.
Tories accused of hiding Eastleigh by-election candidate after she stays away from Radio 5 Live debate.