The by-election is an important test of the party's ability under Miliband to appeal to southern voters.
With the Tories in second place in 38 of the Lib Dems' 57 seats, Labour will need to consider whether to tacitly advise its supporters to vote for Clegg's party.
The only one of the main parties with no black and minority ethnic MPs needs to promote radical solutions to racial inequality if it is to win credibility on this issue.
A half-hearted commitment to renewal would make an easy concession to Lib Dems in future coailtion talks.
Surprise defeat over press regulation will force the Tories to overturn Lords amendments in the Commons. But will Labour and the Lib Dems let them?
Twenty two Labour MPs and four Liberal Democrat MPs voted against the equal marriage bill last night.
Clegg has a chance to prove the Lib Dems won't be wiped out in 2015 and Cameron a chance to show how the Tories could win a majority.
Party activists are tired of being told that there is such a paucity of Lib Dem talent that the former Energy Secretary leaves a vacuum behind him.
Lib Dem activists point out that the party has gained seats in recent local elections.
Former Lib Dem Energy Secretary announces that he will resign his Eastleigh seat after changing his plea to guilty following the opening of his trial.