To name just a few: When and why did you decide to fire James Comey, the F.B.I. director, who was leading the Russia investigation at the time? What did you mean when you told NBC’s Lester Holt that you fired Mr. Comey because “this Russia thing with Trump and Russia is a made-up story”? Did you try to persuade the attorney general, Jeff Sessions, to protect you from the investigation? Did you secretly promise to pardon Michael Flynn, the former national security adviser who has pleaded guilty to lying to federal investigators about his communications with the Russian ambassador?

The questions are a reminder of just how aberrant this White House has been. No prior president so openly assaulted the rule of law or undermined the integrity of the law enforcement community. In that light, Mr. Mueller’s questions also provide a measure of comfort that, amid all the chaos and tumult of this administration, career public servants in law enforcement continue to do their jobs, investigating crimes and pursuing justice. It may unnerve Mr. Trump, who has spent his life skirting the law and avoiding full accountability, but this is how the law works. Without saying a word publicly, Mr. Mueller and his team of experienced investigators are showing America how a government premised on the rule of law is supposed to function. The process may seem slow, but that is out of diligence and caution. Its fundamental purpose is truth-seeking — unlike, say, the embarrassing obfuscations of the Republican leaders of the House Intelligence Committee, who last week absolved Mr. Trump and his campaign of any wrongdoing in a 250-page report that reads more like a work of fantasy than a government investigation.

Early Tuesday morning, Mr. Trump tweeted that the leak of Mr. Mueller’s questions was “disgraceful” and that “it would seem very hard to obstruct justice for a crime that never happened!”

Wrong. Obstruction of justice is itself a federal crime — see, for example, Section 1505 of Title 18 of the United States Code — regardless of whether prosecutors can establish an underlying offense. Mr. Trump and his defenders mock it as a “process crime,” but the rule of law breaks down if people can interfere, with impunity, in law enforcement’s efforts to do justice. Don’t forget that both presidents who have faced impeachment proceedings in the past few decades, Richard Nixon and Bill Clinton, were accused of obstructing justice.