The highly anticipated debate between Vice President Kamala Harris and former President Donald Trump will take place in Philadelphia, a critical swing state, at 9 p.m. ET on ABC News. This debate is pivotal as the race remains very close, with recent polls showing a dead heat between the two candidates. Harris has prepared by clarifying her policy positions, while Trump has focused on solidifying his base despite his controversial past. The debate will have no live audience, and security is tight due to expected protests. Both candidates' performances could sway undecided voters and are crucial given Pennsylvania's significant electoral votes. The event marks Harris's first major test since President Joe Biden dropped out of the race, making her the Democratic nominee.