Kamala Harris and Donald Trump met face-to-face for the first time on a debate stage in Philadelphia Tuesday. The matchup marked a pivotal moment during the final sprint of a close race for the White House and saw Trump and Harris lay out starkly different visions for the future of America. While it started with a handshake, the debate quickly saw the Democratic vice-president and Republican former president zero in on each other's records. Harris described Trump as dangerous and unfit for office.