Caroline Kennedy warns senators that cousin Robert F Kennedy Jr is a ‘predator’

Robert F Kennedy Jr is poised to become Donald Trump’s health secretary (J Scott Applewhite/AP)

Caroline Kennedy has urged the US Senate to reject the nomination of her cousin, Robert F Kennedy Jr, to be health secretary, calling him a “predator” who is addicted to power.

In a letter to Senators, Ms Kennedy, who previously served as a US ambassador to Australia and Japan and is the daughter of former President John F Kennedy, etched a damning sketch of her cousin, the latest condemnation Robert F Kennedy Jr has received from members of his own, prominent Democratic family.