For special counsel Robert Mueller and his team of seasoned federal prosecutors, not much is off limits. And that could spell all kinds of trouble for a president who has sought to keep his finances private, surrounded by top aides who have all kinds of interesting financial entanglements of their own.

Mueller “certainly is acting as if, in fact, he has jurisdiction to investigate any and all offenses in the statute of limitations, of all the people who he is investigating in the first place,” said David Rivkin, an attorney who formerly worked in the George H. W. Bush and Reagan administrations.

In other words, if someone in Trump’s orbit committed a crime and the statute of limitations for that crime isn’t up—well, watch out.