The report is unlikely to be a dictionary-thick tome, which will disappoint some observers. But such brevity is not necessarily good news for the president. In fact, quite the opposite.

For months, the president’s lawyers have tried to discredit Mr. Mueller and this report, but their efforts may have backfired. A concise Mueller report might act as a “road map” to investigation for the Democratic House of Representatives — and it might also lead to further criminal investigation by other prosecutors. A short Mueller report would mark the end of the beginning, not the beginning of the end…

Sure, it is at least possible to envision the special counsel resolving each strand of the investigation and making such information public in detail. But it is also quite possible — and more likely — to think that the president’s bashing of Mr. Mueller may induce him to issue a more limited, by-the-book report, which will spawn further investigation. And the bashing may have encouraged Mr. Mueller to turn matters over to other investigators who have not been subject to the same sorts of public attack.