The full spreadsheet is not public. But the highlights would not incite fear among self-respecting members of Congress. They would compel lawmakers to switch on hearing-room lights and order staff to start digging. Every reported item on the list should already be the subject of sustained congressional inquiry. Some of them should have produced new laws. Mr. Trump’s refusal to release his tax returns, in violation of a norm respected for decades, should have resulted in a new requirement that all major-party presidential nominees disclose their tax records. The president’s refusal to dissolve his interest in his sprawling private business and his continual insistence that conflict-of-interest rules do not apply to him should have spurred a new round of government ethics legislation. Though lawmakers have taken some initial steps to shore up election security and to punish the Kremlin for its 2016 meddling, more ambitious legislation should have passed first thing last year, instead of continuing to languish.