Senate sparring partners Pauline Hanson and Derryn Hinch have exchanged heated words in the hallways of Parliament House over the revelations about United States presidential candidate Donald Trump's attitudes to women.

Their spat, caught on camera, followed an interview with Seven's Sunrise program in which the two were asked whether the Republican contender should quit the race for the White House following the airing of 2005 comments in which he bragged about groping women.

The argument between two of the most outspoken crossbench senators came as Prime Minister Malcolm Turnbull, in rare commentary on the eyebrow-raising US election campaign, labelled Mr Trump's remarks "loathsome".

In the Monday morning interview, Senator Hinch said Mr Trump's behaviour was despicable and he should not have been a nominee in the first place but predicted he wouldn't quit the race.