And this is a country that I don't want looking foolish.
Mr Mueller, a former Federal Bureau of Investigation 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. The White House legal team did not confirm the information, but said it is "continuing its full cooperation".
And any lawyer who has had a client like Trump knows that the worst thing is that Trump doesn't know he is very bad at giving good answers to legal questions.
With opinion polls suggesting the Democrats are well-placed to take back Congress, and possibly the Senate too, the clock is ticking on Trump gambling on a pre-emptive strike to neutralise Mueller's operation and stand a realistic chance of Capitol Hill backing him to do so.
"If Trump lies during this interview, he will be guilty of a felony", Andy Wright, a professor at Savannah Law School, told me. "I regard that "unless" as extremely implausible". "But you know, sort of like when you've done nothing wrong, let's be open and get it over with", he said.
At the same time, former senior Federal Bureau of Investigation agent turned Yale lecturer Asha Rangappa publicly warned that Mueller may not have the constitutional power to criminally indict the president himself, even if he is convinced he's unearthed the evidence to justify it. The relevant Office of Legal Counsel opinion makes clear: "Recognizing an immunity from prosecution for a sitting President would not preclude such prosecution once the President's term is over or he is otherwise removed from office by resignation or impeachment".
Fordham Law School professor Jed Shugerman reasons, "Thus, he still has the privilege against self-incrimination for that later criminal liability". Neal Katyal, former acting solicitor general, agrees that while Trump's Fifth Amendment rights to avoid self-incrimination apply since "any testimony he gives now could be used to incriminate him down the line", the political consequences would be debilitating.
With indications that special counsel Robert Mueller is seeking an interview with President Trump, here are some burning questions his team will want to ask. "And it's not going to look foolish as long as I'm here".
Knowing all this, it is highly unlikely the special prosecutor would "settle" for a written statement crafted by Trump's attorneys.
For Trump's lawyers, their only goal in life should be to keep Trump out of that room. With his personal ratings of well under 40% at a record low for a first year president, Trump is clearly unpopular with the electorate at large, yet retains rock solid among the more conservative GOP support base.
On Monday, US Senator Richard Blumenthal told CNN that Trump's one-on-one interview with Mueller is necessary and the time when it will take place is important, given that as much evidence as possible must be collected in the Russian Federation probe before the meeting occurs.