If presidential elections were forensic matches, then Kamala Harris would be on her way to the White House. The vice president won Tuesday's debate on points, baiting Donald Trump into diverting from his core message that Harris is too incompetent and too liberal for the Oval Office. The evening was a missed opportunity for Trump to build on his slight, margin-of-error lead in the latest New York Times/Siena poll. Harris—with help from the moderators—emerged unscathed.