Vice President Kamala Harris gave a nice, no-calorie acceptance speech last week. She said nothing about her two substantive policy proposals to date—price controls and a Publishers Clearinghouse-style giveaway of $25,000 for first time new home buyers—and steered clear of formal repudiation of her 2019 presidential campaign platform. (As Senator Tom Cotton pointed out repeatedly to ABC’s Jonathan Karl Sunday, Harris has not said a word about her alleged repudiation of her 2019 proposal to abolish...