Presidential debate live updates: Trump and Harris face off in Philadelphia

This is CNBC's live coverage of the 2024 presidential debate between Democratic Vice President Kamala Harris and Republican former President Donald Trump in Philadelphia on Sept. 10.

Republican presidential nominee Donald Trump will square off Tuesday against Vice President Kamala Harris, the Democratic nominee, in a prime-time debate that could alter the course of an unprecedented race for the White House.

The 90-minute debate hosted by ABC News will begin at 9 p.m. ET, at the National Constitution Center in Philadelphia.

It will also be the first time Harris and Trump have ever met in person, just eight weeks before the Nov. 5 election.

Polling averages indicate the race is effectively tied at the national level, while surveys of the key battleground states show Trump and Harris within a few points of each other, and well within the polls' margins of error.

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• Harris previews her Trump debate plan: ‘I think he’s gonna lie’
• 'Go higher': Bernie Sanders urges Harris to raise 28% capital gains tax rate proposal
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• Presidential debate live updates: Trump and Harris face off in Philadelphia
• Trump Media shares close over 5% higher after poll seen as good news for ex-president
• Harris previews her Trump debate plan: ‘I think he’s gonna lie’
• 'Go higher': Bernie Sanders urges Harris to raise 28% capital gains tax rate proposal
• Former Vice President Dick Cheney, a Republican, will vote for Kamala Harris in