Donald Trump might have had his lawyer pay other women who came forward claiming affairs with the president "if necessary", his lawyer Rudy Giuliani said on Sunday.

The former New York mayor was speaking in response to the furore surrounding a payment of $130,000 to adult film star Stormy Daniels made by Michael Cohen, Mr Trump's personal lawyer.

The sum was paid along with a non-disclosure agreement intended to prevent her talking about an alleged tryst with the president.

Miss Daniels, whose real name is Stephanie Clifford, sued Mr Trump in March to get out of the "hush agreement".

When asked on the ABC current affairs show, This Week, whether Mr Giuliani has knowledge of any other women being paid, he said: “I have no knowledge of that. But I would think if it was necessary, yes.”