President Trump has said he did not know about a $130,000 (£92,000) payment made by his lawyer to porn star Stormy Daniels before the 2016 election – his first public comment on the issue.
Asked on board Air Force One if he knew about the payment or where the money had come from, Mr Trump said “No”.
Asked why his lawyer Michael Cohen made the payment, Mr Trump said: “You’ll have to ask Michael.”
The actress says she had sex with Mr Trump in 2006. He denies it.
Ms Daniels, whose real name is Stephanie Clifford, says she signed an agreement to keep quiet about her claims in exchange for $130,000 in October 2016, days before the presidential election.
Mr Cohen has admitted to making the payment privately, but has denied that Mr Trump was a party to the transaction.