Donald Trump has called Omarosa Manigault Newman “a lowlife” in his first public response to the former White House aide’s tell-all book.

Manigault Newman’s book, Unhinged, characterises the US president as a bigot, sexist and racist who she claims has been caught on mic using the N-word multiple times.

When asked whether he feels betrayed by his former aide at a photo opportunity with the group Bikers for Trump in New Jersey on Saturday, Trump said: “Lowlife. She’s a lowlife.”