Pete Wishart said the SNP could consider 'withdrawing from the apparatus of the UK state'.
Labour leadership contender Lisa Nandy has suggested the decision on whether to hold a second independence...
The First Minister said a ballot could be held without Westminster's consent provided it's ruled as legal.
More than half of Scots would vote for independence - but they don't support a referendum this year.
MSPs voted by 64 to 54 for the principle of a referendum but Boris Johnson refuses to allow one.
The Labour leadership contender said he wanted a new constitutional set-up 'based on federalism'.
The First Minister's spokesman said she remains 'committed' to holding a vote this year.
Ex-justice secretary Kenny MacAskill - and newly-elected MP - said a longer wait is 'no bad thing'.
Holyrood backed the Referendums (Scotland) Bill at its final stage by 68 votes to 54.
The First Minister has called for the Prime Minister to 'agree and negotiate' the transfer of powers to Holyrood to hold indyref2.
The First Minister said there is 'growing cross-party recognition' the question of a second vote should not be decided at Westminster.
The First Minister will invite people in Scotland to come together to back another referendum.
The SNP Westminster leader said the general election 'reaffirmed the mandate' for a referendum.
The UK Government has ruled out a second Scottish independence referendum.
She warned Boris Johnson: 'Scotland cannot be imprisoned in the Union against its will.'
Nicola Sturgeon has told the PM he can't 'bludgeon' Scotland into seeing the world the way he does.
On Scotland Tonight, the SNP leader was also quizzed on indyref2 and her domestic record.
Jackson Carlaw has ruled out the prospect of indyref2 during Boris Johnson's premiership.