President Donald Trump said he hopes a senior aide who has resigned amid allegations he beat two former wives has "a great career ahead of him".

Rob Porter left the White House after the allegations - including a photograph of his first wife, Cobie Holderness, sporting a black eye - came to light.

But on Friday the US president chose not to express any sympathy for the two women, instead praising Mr Porter's work as the White House's staff secretary.

"We wish him well. He worked very hard, no doubt about it," Mr Trump told reporters in the Oval office.

"He did a good job while he was in the White House. Hopefully he will have a great career ahead of him."

The president added: "As you probably know he says he is innocent ...I think you have to remember that".