As the White House has been increasingly cooperating with Mr Mueller’s investigative team there has been mounting anxiety – and disagreement – about how to respond to the prosecutor’s demands.
NBC reported on Monday that the President’s lawyers are looking for clarification on whether Mr Trump would be interviewed directly by Mr Mueller as well as the legal standard for when a president can be interviewed – the location of a possible interview – the topics and how long the discussion could last.
But the President’s team could also be hoping to avoid an interview altogether.
There is also a question over whether Mr Trump could just sign an affidavit affirming that he is innocent of any wrongdoing.
A meeting with Mr Mueller could pose serious risks for Mr Trump as it would expose him to questions over some of his most controversial actions as president – including his firing of Mr Comey and his possible obstruction of justice.