It is no longer journalistically sound to report on the Trump investigation as if it is a matter that may, or may not, yield damning information about the President. In a series of filings that came Friday night, the office of the special counsel, Robert Mueller, and a separate group of federal prosecutors in the Southern District of New York, laid out evidence that, taken together, leaves little doubt that Donald Trump sought to use his candidacy to enrich himself by approving a plan to curry political favor from Vladimir Putin in exchange for a lucrative real-estate opportunity.