Harris to visit U.S.-Mexico border to tout toughness on immigration AxiosWith immigration weighing on her candidacy, Harris heads to the front lines NBC NewsHarris Heads to the Border, Trying to Project Toughness Against Trump The New York TimesHarris border visit to focus on curbing fentanyl flow, boosting resources for border agents The HillHarris is visiting Arizona. But her campaign is prioritizing the Rust Belt. POLITICO