Robert Kennedy Jr, a longshot independent candidate for US president, has sought to woo Libertarian party voters by casting rivals Donald Trump and Joe Biden as enemies of individual freedom.
Kennedy, 70, brought Libertarians to their feet by promising to pardon government whistleblower Edward Snowden, currently exiled in Russia, and drop espionage charges against Julian Assange, the WikiLeaks founder battling US attempts to extradite him from Britain.