Harris to call for tougher security measures in first trip to southern border as nominee CBS NewsHarris heads to southern border looking to flip script on immigration criticisms Fox NewsHarris is visiting Arizona. But her campaign is prioritizing the Rust Belt. POLITICOHarris Heads to the Border, Trying to Project Toughness Against Trump The New York TimesHarris heads to the US southern border, looking to close a polling gap with Trump CNN