Hillary Clinton has not ruled out running for president in 2020, a new report claims.

The former US senator and secretary of state has told friends that she is "not closing the doors" on her Oval Office ambitions.

CNN correspondent Jeff Zeleny said during an appearance on Inside Politics: "I'm told by three people that as recently as this week, she was telling people that look, given all this news from the indictments, particularly the Roger Stone indictment, she talked to several people, saying 'look, I'm not closing the doors to this.'"

"It does not mean that there's a campaign-in-waiting, or a plan in the works," he added.

Ms Clinton was the Democratic nominee for president in 2016 but lost to Donald Trump in a seismic upset, though she did win the popular vote.

Sources point to FBI office in New York City for Hillary Clinton leaks Show all 8 1 /8 Sources point to FBI office in New York City for Hillary Clinton leaks Sources point to FBI office in New York City for Hillary Clinton leaks NEW YORK, NY - NOVEMBER 4: A view of the Jacob K. Javits Federal Building, where the Federal Bureau of Investigation (FBI) has a field office on the 23rd floor, November 4, 2016 in New York City. FBI Director James Comey informed Congress last Friday that his agency was taking steps to review newly discovered emails relating to Democratic presidential candidate Hillary ClintonÃs private email server. (Photo by Drew Angerer/Getty Images) Getty Sources point to FBI office in New York City for Hillary Clinton leaks NEW YORK, NY - NOVEMBER 4: A view of the Jacob K. Javits Federal Building, where the Federal Bureau of Investigation (FBI) has a field office on the 23rd floor, November 4, 2016 in New York City. FBI Director James Comey informed Congress last Friday that his agency was taking steps to review newly discovered emails relating to Democratic presidential candidate Hillary ClintonÕs private email server. (Photo by Drew Angerer/Getty Images) Getty Sources point to FBI office in New York City for Hillary Clinton leaks NEW YORK, NY - NOVEMBER 4: A view of the Jacob K. Javits Federal Building, where the Federal Bureau of Investigation (FBI) has a field office on the 23rd floor, November 4, 2016 in New York City. FBI Director James Comey informed Congress last Friday that his agency was taking steps to review newly discovered emails relating to Democratic presidential candidate Hillary ClintonÕs private email server. (Photo by Drew Angerer/Getty Images) Getty Sources point to FBI office in New York City for Hillary Clinton leaks NEW YORK, NY - NOVEMBER 4: A view of the Jacob K. Javits Federal Building, where the Federal Bureau of Investigation (FBI) has a field office on the 23rd floor, November 4, 2016 in New York City. FBI Director James Comey informed Congress last Friday that his agency was taking steps to review newly discovered emails relating to Democratic presidential candidate Hillary ClintonÕs private email server. (Photo by Drew Angerer/Getty Images) Getty Sources point to FBI office in New York City for Hillary Clinton leaks NEW YORK, NY - NOVEMBER 4: A view of the Jacob K. Javits Federal Building, where the Federal Bureau of Investigation (FBI) has a field office on the 23rd floor, November 4, 2016 in New York City. FBI Director James Comey informed Congress last Friday that his agency was taking steps to review newly discovered emails relating to Democratic presidential candidate Hillary ClintonÕs private email server. (Photo by Drew Angerer/Getty Images) Getty Sources point to FBI office in New York City for Hillary Clinton leaks NEW YORK, NY - NOVEMBER 4: A view of the Jacob K. Javits Federal Building, where the Federal Bureau of Investigation (FBI) has a field office on the 23rd floor, November 4, 2016 in New York City. FBI Director James Comey informed Congress last Friday that his agency was taking steps to review newly discovered emails relating to Democratic presidential candidate Hillary ClintonÃs private email server. (Photo by Drew Angerer/Getty Images) Getty Sources point to FBI office in New York City for Hillary Clinton leaks NEW YORK, NY - NOVEMBER 4: A view of the Jacob K. Javits Federal Building, where the Federal Bureau of Investigation (FBI) has a field office on the 23rd floor, November 4, 2016 in New York City. FBI Director James Comey informed Congress last Friday that his agency was taking steps to review newly discovered emails relating to Democratic presidential candidate Hillary ClintonÃs private email server. (Photo by Drew Angerer/Getty Images) Getty Sources point to FBI office in New York City for Hillary Clinton leaks NEW YORK, NY - NOVEMBER 4: A view of the Jacob K. Javits Federal Building, where the Federal Bureau of Investigation (FBI) has a field office on the 23rd floor, November 4, 2016 in New York City. FBI Director James Comey informed Congress last Friday that his agency was taking steps to review newly discovered emails relating to Democratic presidential candidate Hillary ClintonÃs private email server. (Photo by Drew Angerer/Getty Images) Getty

She was the first woman to ever run for president through securing the nomination of a major political party.

A clear frontrunner is yet to emerge and though more than eighteen months remain until the election, more candidates for the Democratic nomination are expected to declare soon.

"I think we have to at least leave our mind open to the possibility that [Clinton] is still talking about it," Mr Zeleny said.

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