The beginning of May marks the longest period of public silence from special counsel Robert Mueller’s team since his first charges last October—more than two months without any new plea deals, fresh indictments, or publicly “flipped” witnesses.

At the same time, though, it’s been a period of aggressive moves that continue to illustrate an investigation that is far from complete, including the raid by federal prosecutors on Trump lawyer Michael Cohen’s office, court evidence that shows Mueller’s team successfully sought permission to expand the scope of the probe, the release of former FBI director James Comey’s memos documenting his interactions with the president, continual hints that the special counsel is probing the UAE, the odd meeting by Blackwater founder Erik Prince in the Seychelles, and numerous other aspects of the complex, multi-part investigation.

Recent weeks have also seen President Trump tweeting regularly about the investigation and the capital W, capital H “Witch Hunt,” and in his train wreck of a phone interview with Fox & Friends last week, he hinted that his patience is wearing thin, referring to “our Justice Department, which I try and stay away from, but at some point I won't.”

“I’ve taken the position—and I don’t have to take this position and maybe I’ll change—that I will not be involved with the Justice Department. I will wait until this is over. It's a total, it's all lies and it’s a horrible thing that’s going on, a horrible thing,” he said. “They have a witch hunt against the President of the United States going on.”

It’s clear that this is no made-up 'witch hunt.'

Then, last night, the final hours of April held one final surprise: The New York Times published a list of questions that, according to Donald Trump’s legal team, Mueller’s office wants to ask the president. The more than four dozen questions span a spectrum from the Steele dossier to suspicious, Russia-friendly changes to the GOP’s party platform during the 2016 Cleveland convention, but most of the questions focus on the president’s own statements and reactions to various steps of the investigation, and his interactions with three key figures: former national security adviser Mike Flynn, attorney general Jeff Sessions, and Comey.

Donald Trump himself tweeted about the questions early Tuesday, saying it was a “disgrace” that they leaked, but the Times story sources the leak to people on Trump’s side; Mueller’s team continues to operate almost entirely leak-free. It’s also hard to read the leaks as anything other than an attempt to bring public pressure on Trump to refuse an interview with Mueller’s team. (According to media reports, Trump has been keen to sit down with Mueller, but his legal team has advised against it.)

Mueller’s proposed questions are primarily high-level—presumably the starting point for what would then be increasingly detailed follow-ups, backed up by specific emails, documents, telephone records, and other files Mueller’s team and FBI investigators have accumulated in an investigation stretching back more than two years. While the initial 49 questions are intriguing on their own, they primarily line up with what’s publicly known about the investigation so far. There’s nothing out of left field. Thus, the real mystery is the follow-ups: Why, precisely, is Mueller interested?

Taken as a whole, the leaked questions help shape and underscore some key takeaways:

1. Mueller always knows more than we think. Every single indictment has been deeper, broader, and more detailed than anyone anticipated. This “misunderestimating” of what Mueller knows has been true of both the public and media reports, and of his witnesses and targets: Both Rick Gates and Alex van der Zwaan were caught in lies by Mueller’s team, who have known far more specific information than their targets first realized. Presumably, Mueller’s questions to Trump are informed by even more evidence that we haven’t seen.