Defeated Democratic candidate Hillary Clinton has used a Four Corners interview to double down on accusations Julian Assange and Russian spies were the key factors in Donald Trump's election.

Hillary Clinton won the popular vote in last November's poll but Donald Trump became President thanks to America's electoral college system.

The former Secretary of State, New York Senator and First Lady has told Four Corners Julian Assange is a "tool of Russian intelligence", a charge Mr Assange has taken to Twitter to deny.