Former President Herbert Hoover responded to a 1964 interview: “Honesty is not the exclusive property of any political party.” We don’t elect local officials in California on the basis of a political party, but Mr. Hoover’s answer applies federally with an incumbent president confronting certain articles of impeachment and a predictable U.S. Senate trial in January 2020 (Mr. Hoover’s opinion is undoubtedly irrelevant in California, which has only one political party, for all intents and purposes.)