The White House has refused to confirm or deny media reports that the US President could be interviewed by Special Counsel Robert Mueller about possible collusion between Donald Trump's campaign and Russia during the 2016 presidential race.
"The White House does not comment on communications with the Office of the Special Counsel out of respect for the Office of the Special Counsel and its process," said Mr Trump's lawyer Ty Cobb.
Mr Mueller, a former FBI director, may also be looking at whether Mr Trump and his inner circle sought to obstruct justice, which has raised speculation that the president himself would be interviewed.
Mr Trump has indicated he would talk to Mr Mueller, although the political and legal risks of a sitting president being questioned by the special prosecutor are manifold.
US intelligence agencies have concluded that Russia interfered in the election to try to help Mr Trump win.
Russia has denied any meddling and Mr Trump has said there was no collusion.
"There's been no collusion; there's been no crime," he told reporters at the Camp David presidential retreat in Maryland on Saturday. "And, in theory, everybody tells me I'm not under investigation."
The special counsel's office declined to comment on the US media reports.
Mr Mueller's probe so far has led to two Trump associates, former national security adviser Michael Flynn and campaign aide George Papadopoulos, pleading guilty to lying to FBI agents.
Two others, former Trump campaign manager Paul Manafort and his associate, Richard Gates, were indicted on money laundering charges but have pleaded not guilty.
