The Mueller report has exonerated President Trump and his campaign of Russian collusion. What about others who were smeared alongside him? Last year some reporters investigated me as a possible colluder. It has damaged my reputation and my business.

I’m a private real-estate and energy investor in California, a donor to Republican political candidates and sometime lobbyist. On Feb. 1, 2018, McClatchy Newspapers published the first of four big stories on me—four parts!—with the opening headline: “Master of selfies with GOP...