Special counsel Robert Mueller is investigating claims the Trump campaign colluded with Russia over the 2016 election, and possibly other topics the public may know nothing about.
He's been on "the case" only a few months, since ex-FBI Director James Comey was fired, but the review, going back into last year, hasn't produced any evidence yet, and Mueller's now putting his agenda before a grand jury.
And his investigators have gone to the White House requesting documents concerning former national security adviser Gen. Michael Flynn.
Whether his probe, which reportedly now may be encompassing Trump's vast business empire and the financial transactions of his associates, produces results or not remains to be seen.
But given his record of scandals when he was the FBI chief, things don't look promising.