After a General Election result in which the Labour leader defied all expectations by robbing Mrs May of her parliamentary majority, the veteran left-winger is planning to use the Queen’s Speech to oust the floundering Prime Minister.
In an interview with the Sunday Mirror, he said: “I can still be Prime Minister. This is still on. Absolutely. Theresa May has been to the Palace. She’s attempting to form a government.
“She’s then got to present a programme to Parliament.
“We will – obviously – amend the Queen’s Speech. There’s a possibility of voting it down it and we’re going to push that all the way.
“We have got a mandate to deal with issues of poverty, justice and inequality in Britain. We want to end austerity and invest in this country and that’s what we’re going to do.
“Nearly 13 million people voted for us to do it. That’s why I’m here.”
After an incredible Labour resurgence saw Mr Corbyn’s party win an afdditional 30 Commons seats, the Prime Minister is forming an alliance with the Northern Irish Democratic Unionists to command a Commons majority of two.
But Mr Corbyn believes he can muster opposition from the rest of the House – and from Mrs May’s own backbenchers – to defeat the Government.
A second election could be called if Mrs May fails to pass her Queen’s speech – and Mr Corbyn is confident his progressive manifesto will attract enough support in Parliament to drive him into Number 10.
The Islington North MP said: “It’s very unclear on the programme they’ll be able to put forward. But we’ll put up our demands and our message and we’ll assert those.
“I don’t think Theresa May and this Government have any credibility. The Prime Minister called this election on the basis she would need a stronger mandate to negotiate Brexit.
“Well look what’s happened. The parallels are with 1974 when the Conservatives sought – as they have done this time – a ‘who governs Britain?’ mandate.
“Ted Heath lost and tried to form another government and tried to get another majority in Parliament.
“And eventually Harold Wilson managed to form a government. She’s taking us back to those times. It’s back to the seventies with Theresa May.”
Mr Corbyn said the return of rebels who previously saw his leadership position as untenable would be one of the keys to success.
And he said he believes he could bring leading Labour MPs back to the front-bench after his barnstorming campaign.
He added: “Everything’s still to play for. We can still do this. My phone is full of texts from lots and lots of people from right across the party. I’m very happy about that. I’m very proud to lead this party.
“And I’m open to everyone. It’s important to make that clear. I never get involved in personal abuse or anything like that.