The Liberal Democrat leader has said that he expects the party to “do exceptionally well” in the next general election.
Vince Cable is set to step down as the party leader in May to pave the way for a "new generation".
He told talkRADIO’s Dan Wootton that despite of the stalling Brexit negotiations, he was “optimistic” about the future of the UK – and his own party.
“I am not despondent about the country – I am optimistic about its future – I think we have a lot going for us,” Mr Cable said.
“I am very optimistic about the party because our poll ratings have improved. When there is a general election, we will do exceptionally well.
“We now have the wind behind us rather than in front of us. I am optimistic, particularly with the break-up of the Conservative and Labour parties.
“We are planning to work with the Independent Group. There are things coming together that give us an optimistic outlook."
Mr Cable suggested that a second referendum provides a way forward for the country, because Theresa May’s agreement will not “get through”.
He added that European Union was “trying to help the UK” find a way out of the deadlock in Brexit negotiations.
“The European Union have been very reasonable and they are trying to help us find a way out of this,” he said.
“They have given a limited extension but they will give a longer one if the UK government can give a reason for doing so.
“The EU does not want this responsibility thrust on them. They have said that it is a British government matter but that the government has made a terrible mess of it.”