Not content with fuelling rumours that he wants to succeed David Cameron as prime minister, Boris Johnson has refused to rule out running for president of the United States.

Appearing on the BBC's Daily Politics programme from the Conservative conference in Birmingham on Tuesday, the American born of London mayor was asked by Andrew Neil whether he would like to run for the White House after he had led Britain for a few years.

"Andrew this is now getting beyond satire," he said. "My chances of becoming prime minister are, as I always say, the same as being reincarnated as an olive."

"My chances of being president after being prime minister are, I think, no better than yours. Probably considerably worse."

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A non-denial denial. With only 1491 days until Election Day, 2016, Boris better get his campaign team in place pretty sharpish.

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  • The Conservative Party Annual Conference Continues In Birmingham

    BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)

  • Conservative Party Conference 2012

    London Mayor Boris Johnson arrives at Birmingham New Street Station before attending the Conservative Party conference today.

  • Conservative Party Conference 2012

    London Mayor Boris Johnson arrives at Birmingham New Street Station before attending the Conservative Party conference today.

  • Conservative Party Conference 2012

    London Mayor Boris Johnson arrives at Birmingham New Street Station before attending the Conservative Party conference today.

  • Conservative Party Conference 2012

    London Mayor Boris Johnson arrives at Birmingham New Street Station before attending the Conservative Party conference today.

  • The Conservative Party Annual Conference Continues In Birmingham

    BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)

  • The Conservative Party Annual Conference Continues In Birmingham

    BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)

  • The Conservative Party Annual Conference Continues In Birmingham

    BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)

  • The Conservative Party Annual Conference Continues In Birmingham

    BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)

  • The Conservative Party Annual Conference Continues In Birmingham

    BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)

  • The Conservative Party Annual Conference Continues In Birmingham

    BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)

  • The Conservative Party Annual Conference Continues In Birmingham

    BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)

  • The Conservative Party Annual Conference Continues In Birmingham

    BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)

  • The Conservative Party Annual Conference Continues In Birmingham

    BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)

  • The Conservative Party Annual Conference Continues In Birmingham

    BIRMINGHAM, ENGLAND - OCTOBER 08: Mayor of London, Boris Johnson is greeted by journalists as he arrives at Birmingham New Street railway station to attend the Conservative party conference at the International Convention Centre on October 8, 2012 in Birmingham, England. The annual, four-day Conservative party conference began yesterday and feature speeches from Cabinet ministers and the Mayor of London. (Photo by Matt Cardy/Getty Images)