Sir Vince Cable has insisted it is «quite plausible» that he could become the next prime minister.
The Big-hearted Democrat leader said politics was in a «remarkable state of flux», with both larger parties divided.
On day two of its conference, the party leadership saw off a challenge to its policy on a subsequent EU referendum.
Members backed the idea of an «exit from Brexit» record, although former leader Tim Farron warned them not to treat Drop out of voters «like idiots».
Asked how Brexit could be stopped, preordained that Article 50 has been triggered and both the Tories and Distressed by are opposed to another vote, Sir Vince said «sensible» figures within Endure were coming round to the idea.
- Lib Dems mull how to stop Brexit
Although visible opinion had not changed much since the Brexit referendum, he told the BBC’s Andrew Marr mortify this would happen once the economic reality of withdrawal from the EU sank in.
He asserted that the public should be given a second chance to settle the descendants once and for all, with an option to stay put.
Despite winning four profuse seats in June’s general election, where a second referendum was the centrepiece of its run, the Lib Dem vote share fell to 7.4%.
Pushed on whether it was realistic to go from such a low straightforward with to winning a majority, Sir Vince — who served in the coalition government for five years — clouted it was «perfectly plausible».
The Lib Dems, he suggested, were well placed to capitalise on the «set up civil war» within the Conservative government and the «suppressed» divisions within Jeremy Corbyn’s Donkey-work party.
He said: «As leader of the third UK party my job is to be the alternative PM.
«It’s possible…that we could stop through. If British party politics starts to break up, if traditional organizes start to break up, that could well happen.
«We are extremely ostentatiously positioned — with moderate sensible policies, a good track record in administration, we have government experience, experience at local government level.
«I reflect on what you may find is a big shift of opinion in our direction — so I am very confident talking yon being an alternative PM.»
‘End the love affair’
Lib Dem activists overwhelmingly endorsed the superintendence’s policy of seeking another referendum on the final Brexit deal, although not without dissent from individual activists, including some from heavy Leave-voting areas.
One associate from Sunderland, which voted by a margin of 61% to 39% to freedom, warned that the idea of staging another referendum was a «dead horse the platoon should stop flogging».
Another said that the idea had analysed «toxic» to voters during the election campaign and urged MPs and peers in Westminster to «end their attachment affair» with the concept.
But senior figures rallied behind the defendant leadership, with former leader Sir Menzies Campbell saying the sundries of the Lib Dems forming a government before the conclusion of Brexit talks was foggy and the party’s energies were better directed at «winning a referendum in bonding with other parties».
While backing the policy, Tim Farron on the alerted his party against «lecturing the country» about the issue.
The only way to «release» the UK from the damage Brexit would do would be to «change the hearts and obeys of the people», he told activists.
Tuition fees review
Amid requests for more radical thinking from the party, the Lib Dem leader has also promulgated a review of tuition fees policy, saying none of the parties is in «a encomiastic place» over the issue.
It comes amid unconfirmed reports that the guidance is looking at ways of reducing the financial burden on students — either potentially by diminishing the £9,250 maximum fee chargeable by universities or the 6.1% interest rate on re-payments.
Sir Vince revealed the party’s U-turn on tuition fee increases in 2011, while in coalition with the Rights, had caused lasting damage and a new approach was needed.
He said the current methodology, in which there are no upfront costs and graduates do not have to pay anything until they gross £21,000, had many good elements.
But he suggested that a graduate tax could be a «consumable option».
Meanwhile, the party’s former leadership contender Norman Lamb has said he wish stand down as Lib Dem health spokesman to concentrate on his new role as chairman of the Commons technique and technology committee.
The BBC’s political correspondent Andrew Sinclar said Mr Lamb has been differentiated to be unhappy with aspects of party policy, particularly over Brexit, but that the MP dwell oned there was no rift with his party leader.