Minutes prior to the launch, the party's general election chief called for government to announce snap poll.
Even after 12 shadow cabinet resignations, Corbyn is standing firm against a challenge to his leadership.
What comes next is unclear—will renegotiation lead to a deal or a second referendum?
A series of polls on Sunday and Monday put 'Unidos Podemos' in second place overall.
The three Republicans hinted at no longer pledging to support their party's eventual nominee.
This month's general election could be the first step in the legalization of abortion.
The opposition leader's closest aide, Lord Wood, says the Conservatives have become the "nasty party" again.
Scrapping nuclear weapons and tuition fees, and boosting public spending high on the Greens' list of priorities.
Israel and Middle East a key issue for Jewish voters, with 70% intending to vote Conservative.
Areas with bigger spending cuts have greater chance of a food bank opening, says Oxford University report.
Prominent tax expert counters Tory claims that scrapping of non-dom status would cost Britain money.
Opinion polls after the event all produced different winners.
The Lib Dem leader is trailing Labour by two points.
Polls suggest Scottish National Party could form third biggest party in UK Parliament after May 7 election.
British defence secretary calms fears after U.S. army chief raises concern over UK defence spending cuts.
A new model predicting the outcome of the election produced a 94.5% chance of a coalition government.
Syriza won 149 seats in the 300-seat parliament, two short of an absolute majority.
Cameron has said he will boycott the election debates unless the Green party is also included.
Some fear the anti-bailout party will try to renegotiate EU loans, conditions if they win January's election.
Cameron added that he would be "happy for there to be no debates at all".
The three main parties all held events as the campaign proper for the May election kicked off
Blair said the election could be a traditional left versus right contest "with the traditional result"
If the general election were held tomorrow Labour would lose 36 seats, with those of several key figures under threat, according to a new poll