Americans likely face a choice this fall between two men they don’t want for president. Or they can stay home and get one of the two guys they don’t want for president anyway. The reasons for voter disdain are clear enough: Poll respondents say Joe Biden is too old, an impression reinforced by last week’s special-counsel report, and they have always been troubled by Donald Trump’s judgment and character (though a majority think he’s too old too.) Voters have genuine questions about both men. But we’ve seen each occupy the presidency. One thing the two administrations have made clear is that whereas Biden follows an approach to governance that seems to offset some of his weaknesses, Trump’s preferred managerial style seems to amplify his. Many people treat elections as a chance to vote a single individual into office; as a result, they tend to focus disproportionately on the personality, character, and temperament of the people running. But voters are also choosing a platform—a set of policies as well as a set of people, chosen by …