Millions of Americans are voting in an historic election that could put Donald Trump back into the White House or make Kamala Harris the first woman to become US president.
The two candidates are neck and neck in the polls after bitter campaign that saw two assassination attempts against Republican Mr Trump as well as the shock withdrawal of President Joe Biden.
In around 100 days, Ms Harris has found her feet and mounted a fierce challenge to her opponent.
With just hours left before polls close, the election has come down to the wire and could be decided by a handful of crucial battleground states.
Follow live: Harris makes surprise stop in Washington
Voting on Tuesday appears to be smooth, with only scattered reports of delays from extreme weather, long lines or technical problems.
The FBI reported that there had been “non-credible” bomb threats to several states, some of which it said came from Russian email domains.
Pic: AP
How the vote works
As well as those lining up at polling booths on Tuesday, tens of millions of Americans cast early ballots – voting by post or in person before today.
To become president, the winning candidate needs 270 electoral votes or more, with each state carrying a different number of votes.
If the polls predicting a close race are correct, the election will likely come down to a few battleground states: Arizona, Georgia, Michigan, Nevada, North Carolina, Pennsylvania and Wisconsin.
The first ballots cast on Tuesday mirrored the national divide. Overnight, the six registered voters in the tiny hamlet of Dixville Notch, New Hampshire, split their votes between the two candidates in voting just past midnight.
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Key issues for American voters
Read more:
An easy guide to the US election
What Trump or Harris victories would mean for UK
Trump or Harris
Former President Mr Trump, 78, voted in Palm Beach, Florida, near his Mar-a-Lago club.
Wearing his trademark red “Make America Great Again” baseball cap, he said at the polling station that he was feeling “very confident”.
“I hear we’re doing very well,” he said. “It looks like Republicans have shown up in force.”
Elon Musk, the world’s richest man and Trump donor, said he will watch results unfold with the former president.
In the meantime, Ms Harris, the 60-year-old Democratic vice president, did radio interviews in the battleground states of Pennsylvania, Georgia and North Carolina.
A cat seen at a polling booth in battleground state Pennsylvania. Pic: Reuters
What do the polls say?
Many polls are too tight to call and, with a large margin of error, most experts are refusing to predict the outcome.
Georgia could be among the first battleground to declare, with polls there closing at 7pm local time (midnight UK time). State election officials told Sky News they could have a result as early as 10pm (3am UK time).
Keep up with all the latest news from the UK and around the world by following Sky News
North Carolina could also give an early indication of how the vote is going.
Even so, it could be several days before the US has a definitive result.
An exit poll by conducted today by Sky News’ sister outlet NBC News and other US outlets suggests that democracy is the top issue on the minds of voters as they cast their ballots.
Some 35% of people said it was their most important issue, closely followed by the economy on 31% and with abortion ranked third at 14%.
Voters are not just selecting a president. A number of seats in the House of Representatives and the Senate are up for grabs. In addition, 10 states will hold abortion-related ballots, half of which would overturn existing restrictions.
Perplexity AI logo is seen in this illustration taken January 4, 2024.
Dado Ruvic | Reuters
Perplexity AI, the artificial-intelligence search engine startup, is in the final stages of raising $500 million in funding at a $9 billion valuation, a source familiar with the situation told CNBC.
The startup competes against the likes of Google and ChatGPT-maker OpenAI. Perplexity most recent valuation was $3 billion in June. Institutional Venture Partners, a Bay Area-based firm, is leading the new round, according to the source, who requested anonymity since the funding is not yet public.
Perplexity started the year with a roughly $500 million valuation. Since then, the company has continued to attract investor interest amid the generative AI boom, raising four funding rounds so far this year.
Last week, OpenAI launched a search feature within ChatGPT, its viral chatbot, that positioned it to better compete with Perplexity, as well as leading search engines like Google and Microsoft‘s Bing. OpenAI’s search feature offers up-to-the-minute sports scores, stock quotes, news, weather and more, powered by real-time web search and partnerships with news and data providers, according to the company.
Despite the AI boom, Perplexity has been embroiled in controversy due to accusations of plagiarizing content from media outlets. The New York Times last month sent Perplexity a “cease and desist” notice, claiming that the startup scrapes the news outlet’s content to generate answers. Perplexity has denied the allegations.
In July, Perplexity debuted a revenue-sharing model for publishers. Any time a user asks a question and Perplexity generates ad revenue from citing an article in its answer, Perplexity will share a percentage of that revenue with the publisher, the company said.
Media outlets and content platforms including Fortune, Time, Entrepreneur, The Texas Tribune, Der Spiegel and WordPress were among the first to join the company’s “Publishers Program.” Dmitry Shevelenko, Perplexity’s chief business officer, told CNBC in a July interview that if three articles from one publisher were used in one answer, the partner would receive “triple the revenue share.” Perplexity worked on its revenue-sharing model since January, and the company’s goal is to have 30 publishers enrolled by the end of the year, Shevelenko said.
Perplexity’s app has been downloaded more than 2 million times, and it answers more than 230 million queries a month, the company said in August. U.S. queries have increased eightfold in the past year, according to a pitch deck for potential advertisers that was viewed by CNBC.
The Wall Street Journal was first to report on the new funding round.
WATCH: Perplexity unveils AI election hub: Here’s what you need to know
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