Global pop star Taylor Swift's support for Kamala Harris may have boosted the Democratic vice president's hopes of attracting young voters, but the question remains: Will the celebrity endorsement make a difference on Election Day?

Locked in a tight White House race, both Harris and her rival, Republican former President Donald Trump are doing all they can to lure voters on Election Day Nov 5 and in early voting starting next week.

For his part, Trump dismissed Swift's Tuesday night endorsement of Harris, saying he was "not a Taylor fan."

With voter registrations down among young people in a country where 18 is the voting age, the first challenge for either campaign may be getting them to register to vote at all.

Young voters played a decisive role in Democratic President Joe Biden's victory over the then-incumbent Trump in 2020. Biden captured about 61 per cent of the vote to Trump's 36 per cent of voters between the ages of 18 and 29, according to data from Tufts University.

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