Romney: impeachment row with fellow Republican was about 'boxers or briefs'

Utah senator plays down heated exchange with Ron Johnson and insists they discussed underwear preferences

Mitt Romney suggested on Saturday that a heated argument he was seen to have with a Republican colleague in the Senate chamber was not about whether witnesses should be called in Donald Trump's impeachment trial - but concerned the age-old question: Boxers versus briefs".

Related: Senate votes to acquit as Trump celebrates: our movement 'has only just begun' - live