Trump cancelled a previous deposition on 16 October, citing “matters of national importance” while he was campaigning in Georgia.
The judge in the case, US Magistrate Judge Enjoliqué Lett, said that Trump must sit for the deposition by 11 December, unless the discovery period is extended.
Last week, attorneys asked that Lett compel Trump to face deposition after the previous scheduled date did not take place.
On that day, Trump attended a midterms campaign rally in Dalton, Georgia and a fundraiser at his property in Mar-a-Lago in Florida.
The broadcaster has since asked that the court dismiss the lawsuit, arguing that the programme does not meet the legal criteria for defamation and was not available in the US.
