For years, a question has been on the lips of many political watchers: What’s up with Rudolph W. Giuliani? The man who, as New York mayor, built a bipartisan reputation as “America’s mayor” had suddenly refashioned himself as a hatchet man for President Donald Trump and a spokesman for some of Trump’s worst conspiratorial impulses. Whatever one thought of Giuliani’s methods or of all being fair in political war, he surely sacrificed his legacy in the process. The big remaining question was how much he might have sacrificed even more than that, given the potential legal jeopardy involved in some of his pursuits.