The memo waxes on about the importance of campaign-finance law to American democracy, which suggests Mr. Khuzami would indict Mr. Trump if he could. Justice Department guidelines advise against indicting a sitting President, so Mr. Khuzami’s memo looks more like a road map for House Democrats. So much for all the media handwringing that Mr. Trump has interfered with the independence of the Justice Department. He has less influence at Justice than any President since Richard Nixon in his final days.

The political dilemma for Democrats is that lying about sex and paying to cover it up are wrong, but they’re a long way from collaborating with the Kremlin to beat Mrs. Clinton. Mr. Trump lied to the public about his dealings with Mr. Cohen. Bill Clinton lied to the public and under oath in a legal proceeding, yet Democrats defended him. Good luck trying to impeach Mr. Trump for campaign-finance violations.

All of this argues for Mr. Mueller to wrap up his probe and let America get on with the political debate over its meaning for Mr. Trump’s Presidency. Mr. Mueller has been investigating for 19 months, and the FBI’s counterintelligence probe into the Trump campaign began in July 2016, if not earlier. The country deserves an account of what Mr. Mueller knows, not more factual dribs and drabs in sentencing memos.