Jo Swinson has said she will lead a movement to tackle "nationalism and populism" as she joined the race to succeed Cable.
Donations to Britain's governing Conservative Party slumped in the first three months of the year as Theresa May's premiership ebbed, data from the Electoral Commission showed on Thursday.
The Labour leader is under pressure from John McDonnell and Diane Abbott to back a second vote - pressure which has intensified since Labour was overtaken by the avowedly pro-EU Liberal Democrats at the EU elections.
They must also have the backing of 10% of the parliamentary party - currently, the party has 11 MPs.
Labour grandee Alastair Campbell was actually expelled from his party after he confessed to voting Lib Dem.
YouGov's Chris Curtis cautioned against the Lib Dems getting too carried away with the bounce they have enjoyed since the European elections.
The United Kingdom was legally bound to leave the European Union with, or without a deal on March 29th 2019, but a weakened Prime Minister Theresa May determined to deliver the so-called withdrawal agreement given to her by Brussels has since delayed that date twice.
"Unless the Labour Party adopts a credible, coherent position, commits to a People's Vote and campaigns on it, then they will be complicit in my view in helping Boris Johnson become prime minister. and crash out with no deal", he said.
If approved, humble addresses are considered to be binding on the House. After a backlash to her plans to put it to a fourth vote, May announced last week she planned to resign as party leader on June 7.
"They all think this decision is bonkers and they all think it should be reviewed". "And until it gets that, it's not going to win back the support of many many people that it's lost".
Another said there that many Labour parliamentarians were "unhappy" with what they had seen during the election campaign from the leadership.
Tony Blair's former spin doctor Campbell, who is appealing against his expulsion from the party, has said there was "no justification" for the decision. The poll, conducted on 28 and 29 May, also found that almost 70% of voters believed Brexit was the most important issue facing the UK.