Following President Biden’s dramatic exit from the presidential race, Kamala Harris has not only seized the presidential baton but taken command of the 2024 campaign. Beginning with her first appearance at Biden’s Wilmington, Del., headquarters, Harris went on the attack. Recapping her career, the vice president described prosecuting “predators who abused women, fraudsters who ripped off consumers, cheaters who broke the rules for their own gain.” With a rhetorical flourish, Harris added this sharp retort: “So, hear me when I say: I know Donald Trump’s type.” After Trump reneged on a scheduled ABC News debate in September, Harris deadpanned that...