Former President Donald Trump plans to visit the U.S.-Mexico border in Arizona on the same day Vice President Kamala Harris is set to deliver her acceptance speech at the Democratic National Convention in Chicago. Trump's visit aims to draw attention to immigration policy, an issue Republicans believe Democrats are weak on, particularly criticizing Harris as the 'border czar.' His campaign highlights the perceived failures in border security under the Biden administration, referencing high illegal crossings and related crime concerns. Meanwhile, polls indicate a competitive race, with Harris holding a slight lead over Trump among registered voters. Trump's campaign includes daily press conferences and engagements with law enforcement, contrasting with Harris's more limited press interactions. The backdrop of this political maneuvering underscores the ongoing battle over immigration as a key election issue.