Two months ago, Kamala Harris was crowned as the Democratic presidential nominee at a jubilant national convention in Chicago.
For thousands of party faithful, she was the electoral saviour, replacing an 81-year-old incumbent who seemed incapable of defeating Donald Trump and winning another term.
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But even then, senior party strategists told me they worried Democrats were overconfident about her path to victory. Now, as election day looms and anxieties grow, it seems their concerns were well-founded.
There is no doubt that Harris enjoyed a surge of momentum, and an instant and significant boost in the polls compared to President Joe Biden, who was lagging far behind Trump. Yet it appears she was winning back those who normally vote Democratic anyway, but who had worried about Biden and his age.
For victory, Harris needs to attract voters from beyond the Democrats’ base, while holding together the fragile coalition that helped Biden win in 2020.
The latest polls show a race that has tightened in recent weeks and is now essentially a tie.
Worrying for Democrats is that Trump has gained ground in the crucial “blue wall” states that offer Harris her clearest path to victory – Michigan, Wisconsin and Pennsylvania – as well as among black and Latino voters.
Although the race is neck-and-neck in the key swing states, poll numbers are within the margin of error. In other words, they could be wrong.
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But Harris’s criticism of Trump, her Republican opponent, has become much darker in the last few days. At the convention, she laughed at Trump, dismissing him as an “unserious man” and “weird”. Now she is calling him a “fascist” and “increasingly unhinged and unstable”.
Her original message of wanting to bring “joy” has turned to one of fear – warning of what she says are the dangerous consequences of a second Trump term.
Polling suggests Harris is likely to win the popular vote. But that won’t be enough. She has to win key battleground states to win in the electoral college.
But in recent weeks as I’ve travelled through most of those states, the reservations many voters still have about Harris – a woman they feel they still don’t know enough about – have been clear.
‘I won’t forgive the Democrats’
Harris has a very particular problem in Michigan, which has the highest concentration of Arab-American voters in the US.
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Biden won the state in 2020 by just over 150,000 votes, but his administration’s inability to rein in Israel’s attacks in Gaza and Lebanon has deeply hurt the party’s standing among the 300,000 Arab-Americans living here.
Harris, Biden’s vice-president, is being held equally responsible.
In the Haraz coffee shop in Dearborn, a Middle Eastern-style café serving Turkish coffee and pomegranate juice, I met a group of lifelong Democrats who normally would be out campaigning.Samraa Luqman says that even while she’s a Democrat, she won’t be voting for Harris over the war in Gaza
I expected to hear some of them say they couldn’t vote for Harris, and would be sitting out the vote. But Samraa Luqman, who describes herself as further left than most Democrats, said she is not only voting Trump but is actively encouraging others to do so.
“I believe there has to be accountability for all the lives lost,” she told me. “I do not forgive the Democrats for it, and I will not be scared into voting for them.”
Chadi Abdulrazek said he could never have imagined voting for Trump a year ago, but now Samraa may persuade him.
“If I do want to punish the Democrats, specifically this administration, then I might have to consider that,” he said. ”Every time I say that, I feel like I have to go and throw up. But also I think about my family, my people, in Palestine and in Lebanon”
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2:50The history of swing states in the US
Harris has spoken about her anger over the suffering in Gaza and Lebanon, but these voters want her to say she will refuse to supply weapons to Israel if they are used in strikes that kill civilians.
In Michigan, the working-class and union vote could prove pivotal, too. Jean Ducheman, a United Auto Workers union official in the city of Lansing, Michigan, is more optimistic about Harris.
When I spoke to him in July, he wanted Biden to step aside because of his age. But he also had deep reservations about Harris. Now he says he is convinced she is the best choice and that she is winning over some of his undecided colleagues.
Mr Ducheman believes that campaigning extensively in Michigan has made a real difference.
“She came and spoke to us and that’s really appreciated,” he said, despite the fact that some unions have chosen not to endorse Harris.
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The biggest prize
The most important swing state is Pennsylvania because it has the largest number of votes in the all-important electoral college. With polls deadlocked, both sides have poured hundreds of millions into advertising here to reach undecided voters.
On every visit, I’ve found voters care the most about the economy. And it’s an area where Trump seems to enjoy a significant advantage: No matter how much Democrats point to rosy job numbers or economic growth, people simply felt better off four years ago before record-high inflation cut into monthly budgets.
At a national hunting and fishing event in Bald Eagle State Park, I met Gene Wool, one of those hard-to-find undecideds.
He said he was reluctant to vote for Trump because of what he described as the “scandals surrounding him”.
But Mr Wool is sure that when Trump was in office, food and petrol prices were lower.
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“Most of my friends are probably going to vote for Trump,” he says, adding that he thinks Pennsylvania will swing that way, too.Gene Wool is one of the swing voters in Pennsylvania that both Trump and Harris need to convince
Harris is focusing on women in the Pennsylvania suburbs – especially those who may usually vote Republican but are turned off byTrump’s rhetoric and behaviour.
Recent Harris events where she has appeared with moderate Republicans like former congresswoman Liz Cheney are aimed at persuading this group that it’s preferable to vote Democratic even if you don’t agree with Harris’s policies – just to keep Trump out of the White House.
Could abortion make the difference?
Harris holds a very strong lead among female voters across the nation in an election with the country’s biggest ever gender divide.
She has not campaigned on the historic nature of her candidacy, almost never mentioning that if elected she would be the first female president. But she does stress her support for women’s reproductive rights.
Trump boasts of appointing the Supreme Court justices who ended the nation’s right to an abortion, in place for over 50 years. But he knows that the very strict abortion bans some states introduced afterwards are deeply unpopular with a lot of voters, forcing him to walk a careful line.
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Early one evening in Phoenix, Arizona, recently, I joined some volunteers in a trendy downtown bar having a “postcard party”. They were writing personal messages about why they believe in abortion rights to be sent to Arizona voters. Many are not usually politically active.
In Arizona, one of the two battleground states in America’s west, there is a proposition on the ballot to decide whether to enshrine abortion rights in the state constitution – effectively overturning the current law that forbids terminating a pregnancy after 15 weeks.
The hope for Democrats is that women in the ten states with such abortion ballot measures are driven to the polls by that issue, and while there, cast a presidential vote for Harris.
Nicole Nye told me it was the first time she had become involved in a political campaign, and she has already recruited a voter – her 62-year-old mother who had never voted before.
“I said to her [that] I’m very concerned about my rights. She was fortunate enough to grow up in a time when those rights had been secured for her …It’s concerning that that’s up in the air for me.”
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Arizona polls suggest voters are likely to support the proposition by a wide margin, but that may not translate into votes for Harris. As many as one in five people say they plan to vote to guarantee abortion rights in Arizona, but at the same time cast a ballot for Trump.
Neither Harris nor Trump know who will be the next president of the United States. Nor do any of the pollsters or political pundits.
But it appears Harris has not been able to sustain the excitement and optimism she generated when she first became a presidential candidate. She now has to slog it out, fighting for every vote, to stand a chance of breaking what the last woman to run for US president, Hillary Clinton, called “the highest, hardest glass ceiling”.
With just one day to go, the race for the White House is deadlocked – both at the national level and in the all-important battleground states.
The polls are so close, within the margin of error, that either Donald Trump or Kamala Harris could actually be two or three points better off – enough to win comfortably.
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There is a compelling case to make for why each may have the edge when it comes to building a coalition of voters in the right places, and then ensuring they actually turn out.
Let’s start with the history-making possibility that a defeated president might be re-elected for the first time in 130 years.
Trump could win because…
1. He’s not in power
The economy is the number one issue for voters, and while unemployment is low and the stock market is booming, most Americans say they are struggling with higher prices every day.
Inflation hit levels not seen since the 1970s in the aftermath of the pandemic, giving Trump the chance to ask “Are you better off now than you were four years ago?”
In 2024, voters around the world have several times thrown out the party in power, partly due to the high, post-Covid, cost of living. US voters also seem hungry for change.
Only a quarter of Americans say they are satisfied with the direction the country is going in and two-thirds have a poor economic outlook.
Harris has tried to be the so-called change candidate, but as vice-president has struggled to distance herself from an unpopular Joe Biden.
2. He seems impervious to bad news
Despite the fallout from the 6 January 2021 riot at the US Capitol, a string of indictments and an unprecedented criminal conviction, Trump’s support has remained stable all year at 40% or above.
While Democrats and “Never-Trump” conservatives say he is unfit for office, most Republicans agree when Trump says he’s the victim of a political witch-hunt.
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With both sides so dug in, he just needs to win over enough of the small slice of undecided voters without a fixed view of him.
3. His warnings on illegal immigration resonate
Beyond the state of the economy, elections are often decided by an issue with an emotional pull.
Democrats will hope it’s abortion, while Trump is betting it’s immigration.
After encounters at the border hit record levels under Biden, and the influx impacted states far from the border, polls suggest voters trust Trump more on the immigration – and that he’s doing much better with Latinos than in previous elections.
Trump’s appeal to voters who feel forgotten and left behind has transformed US politics by turning traditional Democratic constituencies like union workers into Republicans and making the protection of American industry by tariffs almost the norm.
If he drives up turnout in rural and suburban parts of swing states this can offset the loss of moderate, college-educated Republicans.
5. He’s seen as a strong man in an unstable world
Trump’s detractors say he undermines America’s alliances by cosying up to authoritarian leaders.
The former president sees his unpredictability as a strength, however, and points out that no major wars started when he was in the White House.
Many Americans are angry, for different reasons, with the US sending billions to Ukraine and Israel – and think America is weaker under Biden.
Despite Trump’s advantages, he remains a deeply polarising figure.
In 2020, he won a record number of votes for a Republican candidate, but was defeated because seven million more Americans turned out to support Biden.
This time, Harris is playing up the fear factor about a Trump return. She’s called him a “fascist” and a threat to democracy, while vowing to move on from “drama and conflict”.
A Reuters/Ipsos poll in July indicated that four in five Americans felt the country was spiralling out of control. Harris will be hoping voters – especially moderate Republicans and independents – see her as a candidate of stability.
2. She’s also not Biden
Democrats were facing near-certain defeat at the point Biden dropped out of the race. United in their desire to beat Trump, the party quickly rallied around Harris. With impressive speed from a standing start, she delivered a more forward-looking message that excited the base.
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While Republicans have tied her to Biden’s more unpopular policies, Harris has rendered some of their Biden-specific attack lines redundant.
The clearest of these is age – polls consistently suggested voters had real concerns about Biden’s fitness for office. Now the race has flipped, and it is Trump who’s vying to become the oldest person to ever win the White House.
This is the first presidential election since the US Supreme Court overturned Roe v Wade and the constitutional right to an abortion.
Voters concerned about protecting abortion rights overwhelmingly back Harris, and we’ve seen in past elections – notably the 2022 midterms – that the issue can drive turnout and have a real impact on the result.
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This time around, 10 states, including the swing state Arizona, will have ballot initiatives asking voters how abortion should be regulated. This could boost turnout in Harris’s favour.
The historic nature of her bid to become the first female president may also strengthen her significant lead among women voters.
4. Her voters are more likely to show up
The groups Harris is polling more strongly with, such as the college-educated and older people, are more likely to vote.
Democrats ultimately perform better with high-turnout groups, while Trump has made gains with relatively low-turnout groups such as young men and those without college degrees.
Trump, for example, holds a huge lead among those who were registered but didn’t vote in 2020, according to a New York Times/Siena poll.
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A key question, then, is whether they will show up this time.
5. She’s raised – and spent – more money
It’s no secret that American elections are expensive, and 2024 is on track to be the most expensive ever.
But when it comes to spending power – Harris is on top. She’s raised more since becoming the candidate in July than Trump has in the entire period since January 2023, according to a recent Financial Times analysis, which also noted that her campaign has spent almost twice as much on advertising.
This could play a role in a razor-tight race that will ultimately be decided by voters in swing states currently being bombarded by political ads.
Kamala Harris, the current vice-president, is the candidate for the Democratic Party. She joined the race after President Joe Biden dropped out and no other Democrats stood against her.
There are also some independent candidates running for president. One of the most prominent was Robert F Kennedy Jr, but he suspended his campaign in August and backed Trump.
The Democrats are the liberal political party, known for supporting civil rights, a social safety net and measures to address climate change.
In the 2024 election, issues highlighted by Harris include tackling the cost-of-living crisis and supporting abortion rights.
The Republicans are the conservative political party. They have stood for lower taxes, shrinking the size of the government and gun rights.
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Issues Trump has campaigned on include tackling illegal immigration and ending inflation to “make America affordable again”.
How does the US presidential election work?
The winner is not the person who gets the most votes overall.
Instead, both candidates compete to win contests held across the 50 states.
Each state has a certain number of so-called electoral college votes, partly based on population. There are a total of 538 up for grabs and the winner is the candidate that gets 270 or more.
All but two states have a winner-takes-all rule, so whichever candidate has the highest number of votes is awarded all of its electoral college votes.
Most states lean heavily towards one party or the other, so the focus is on about seven states where either of them could win. These are known as the battleground or swing states.
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It is possible for a candidate to win the most votes nationally – like Hillary Clinton did in 2016 – but still be defeated.
Most US citizens aged 18 or over are eligible to vote.
Each state has its own voter registration process and deadline.
Who else is being elected in November?
All of the attention will be on who wins the presidency, but voters will also be choosing new members of Congress – where laws are passed – when they fill in their ballots.
Congress consists of the House of Representatives, where all 435 seats are up for election, and the Senate, where 34 seats are being contested.
Republicans currently control the House, which initiates spending plans. Democrats are in charge of the Senate, which votes on key appointments in government.
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These two chambers pass laws and can act as a check on White House plans if the controlling party in either chamber disagrees with the president.
When will we know who has won the election?
Usually the winner is declared on the night of the election, but in 2020 it took a few days to count all the votes.
The period after the election is known as the transition, if there is a change of president.
This gives the new administration time to appoint cabinet ministers and make plans for the new term.
The president is officially sworn into office in January in a ceremony known as the inauguration, held on the steps of the Capitol building in Washington DC.
American voters go to the polls on 5 November to choose their next president.
US election results have sometimes been declared within hours of the polls closing, but this year’s tight contest could mean a longer wait.
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When is the 2024 presidential election result expected?
In some presidential races the victor has been named late on election night, or early the next morning. This time, the knife-edge race in many states could mean media outlets wait longer before projecting who has won.
Democrat Kamala Harris, the current vice-president, and Republican Donald Trump, the former president, have been running neck-and-neck for weeks.
Narrow victories could also mean recounts. In the key swing state of Pennsylvania, for example, a state-wide recount would be required if there’s a half-percentage-point difference between the votes cast for the winner and loser. In 2020, the margin was just over 1.1 percentage points.
0:53BBC’s Sumi Somaskanda explains when a new president will be announced
Legal challenges are also possible. More than 100 pre-election lawsuits have already been filed, including challenges to voter eligibility and voter roll management, by Republicans.
Other scenarios that could cause delays include any election-related disorder, particularly at polling locations.
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On the other hand, vote-counting has sped up in some areas, including the crucial state of Michigan, and far fewer votes will be cast by mail than in the last election, which was during the Covid pandemic.
When have previous presidential election results been announced?
The 2020 election took place on Tuesday 3 November. However, US TV networks did not declare Joe Biden the winner until late morning on Saturday 7 November, after the result in Pennsylvania became clearer.
In other recent elections, voters have had a much shorter wait.
In 2016, when Trump won the presidency, he was declared the winner shortly before 03:00 EST (08:00 GMT) the day after the election.
In 2012, when Barack Obama secured a second term, his victory was projected before midnight on polling day itself.
However, the 2000 election between George W Bush and Al Gore was a notable exception.
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The vote was held on 7 November, but the two campaigns went to war over a tight contest in Florida and the race was not decided until 12 December. The US Supreme Court voted to end the state’s recount process, which kept Bush in place as winner and handed him the White House.
What are the key states to watch in 2024?
Across the country, the first polls will close at 18:00 EST (23:00 GMT) on Tuesday evening and the last polls will close at 01:00 EST (06:00 GMT) early on Wednesday.
But this race is expected to come down to results from seven swing states. These are Arizona, Georgia, Michigan, Nevada, North Carolina, Pennsylvania and Wisconsin.
Polls close at different times in different regions. State-specific rules could prolong counting in some states, while other states may report partial figures moments after the last in-person vote is cast. Also, some absentee and mail-in ballots, including votes by members of the military and Americans living overseas, are normally among the last to be counted.
Georgia – Polls close in the Peach State at19:00 EST (00:00 GMT). Early and mail-in ballots will be counted first, ahead of in-person votes. Georgia’s top election official estimates that about 75% of votes will be counted within the first two hours, with a full tally possible expected by later in the night.
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North Carolina – Polls close thirty minutes after Georgia. North Carolina’s results are expected to be announced before the end of the night, however, complications may arise in areas that were hit by a hurricane in September.
Pennsylvania – Voting ends at 20:00 EST (01:00 GMT) in the Keystone State – the crown jewel of all the swing states in this election cycle. Like Wisconsin, Pennsylvania does not allow counting to begin until the morning of the election, leading to an expected delay in results. Experts agree that it may take at least 24 hours before enough votes are counted for a winner to emerge.
Michigan – Voting concludes at 21:00 EST (02:00 GMT) in the Wolverine State. Michigan allows officials to begin counting votes one week before election day, but they are not allowed to reveal the results until these polls shut. Michigan’s top election official has said that a result should not be expected until the “end of the day” on Wednesday.
Wisconsin – Results should come in shortly after polls close at 21:00 EST for smaller counties. However, it often takes longer for major populations centres to tabulate votes, leading experts to predict that the state won’t have a result until at least Wednesday.
Arizona – Initial results could come as early as22:00 EST (03:00 GMT), however, they won’t paint a complete picture. The state’s largest county says not to expect results until early Wednesday morning. On top of that, postal ballots dropped off on election day could take up to 13 days to count, according to officials in Maricopa County, the largest district in the state.
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Nevada – Votes here could also take days to count, because the state allows mail-in ballots to qualify as long as they were sent on election day and arrive no later than 9 November.