On her first foreign trip as Vice President in June 2021, Kamala Harris was tasked with delivering a blunt message in Guatemala City. "I want to be clear to folks in this region who are thinking about making that dangerous trek to the United States-Mexico border: Do not come," she said at a press conference, pausing for effect. "Do not come." Three years later, that sound bite may come to haunt Harris' nascent presidential campaign. Despite her warning, border crossings reached historic highs during the Biden Administration. Republican critics cast the episode as a symbol of Harris’s ineffective tenure as...