The Democratic vice president and the Republican former president frantically blitzed several swing states as they tried to win over the last holdouts with less than 36 hours left until polls open on Election Day on Tuesday.
Trump predicted a landslide, while Harris told a raucous rally in must-win Michigan that they have momentum.
The 2024 race is going down to the wire, with more key states effectively tied at this point than in any comparable election. Over 77.6 million people have cast early votes, around half of the total ballots cast in 2020.
With the clock ticking, Harris, 60, spent the day in Michigan where she risks losing the critical support of a 200,000-strong Arab-American community that has denounced the US handling of the Israel-Hamas war.