Jeremy Corbyn has told ITV News he will have to "live with, somehow" a decision to renew Britain's nuclear Trident if it is what his party chooses.
The new Labour leader - who has consistently voiced his opposition to Trident - said he would do his best to persuade his party that the £100 billion-weapons system should be scrapped.
"My views on nuclear weapons are very well known - I have a strong moral objection to nuclear weapons," he told Tom Bradby.
"If I can persuade the whole of the Labour Party to come round to my point of view, I would be very, very happy indeed. I will do my best."
But pressed on whether he would concede defeat on the issue, Mr Corbyn said: "If I can't, we'll live with it somehow."
In his first conference speech as leader on Tuesday, Mr Corbyn, 67, said he did not believe renewing the system was "the right way forward".
Asked earlier if he would ever press the nuclear button if he was Prime Minister, Mr Corbyn said: "No."
The Islington MP - who won a landslide victory in the leadership election earlier this month - said that "we are not in the era of the Cold War any more".