He told newsmen the administration is "functioning beautifully" despite talk about direct links with the Putin administration.

Trump also defended his son, who it has emerged met a Russian lawyer during the election campaign.

US media describe the White House as being in chaos over the story, with a Trump ally calling it a "Category 5 hurricane", the Washington Post said.

Donald Trump Jr met Natalia Veselnitskaya believing she had information that would damage his father's opponent Hillary Clinton.

Mr Trump Jr said the meeting was "such a nothing", and "a wasted 20 minutes", but accepted he should have handled it differently.

Some critics say he may have broken federal laws.