While it's overwhelmingly likely Donald Trump will win the overall Republican nomination as more states cast their votes in the coming days, he could be in trouble when he goes head-to-head with Joe Biden.

Shannon Felton Spence from the Harvard University political think tank, The Belfer Centre, told the BBC this morning Republican voters are disenfranchised.

"[Donald Trump] is sweeping this primary election, but [Nikki Haley] is taking a large share of who should be, in theory, Donald Trump votes - sometimes 30%, sometimes 40%, and that spells trouble for him in the general election," she told the Newsday programme.

"In a primary, he should be clearing states in the way that Biden is clearing states, which is 70%, 80%, 90%, and he is not," she said.

Republican voter turnout has been "so incredibly low," she added, that it's clear that voters don't want either candidate.

That's it, we've got results for all Super Tuesday votes.

On the Democrat side, current US President Joe Biden won the vote in all states, but lost in the territory of American Samoa.

For the Republicans, former president Donald Trump won everywhere except for Vermont, where he lost to Nikki Haley.

Here's the breakdown of who won what:

• Biden claimed overwhelming victory in Alabama, Arkansas, California, Colorado, Iowa, Maine, Massachusetts, Minnesota, North Carolina, Oklahoma, Tennessee, Texas, Utah, Vermont and Virginia
• Businessman Jason Palmer won over Biden in the territory American Samoa
• Trump claimed huge victories in Alabama, Alaska, Arkansas, California, Colorado, Maine, Massachusetts, Minnesota, North Carolina, Oklahoma, Tennessee, Texas, Utah, and Virginia
• In the Republican race for Vermont, however, Haley emerged victorious

Sam Cabral
US reporter

I've been speaking to Jason Palmer, who has won American Samoa by 11 votes, marking Joe Biden's first defeat of the night.

He says he focused his campaign on the top three priorities of voters there: health care, education and climate change.

Palmer was a late entrant to the presidential race, throwing his hat in the ring in November.

He says he recognises he's unlikely to upset Biden's run in any great way, but hopes this election puts the pressure on the president to look for a successor.

"I think we need to pass the torch to a younger generation of Americans who have a positive vision for the future and who understand technology," he says.

Palmer is on the ballot in 16 states and is turning his eyes to Arizona next, where immigration is a key influence on voters.

"We need to address the problems at the border, but not with political statements with actual solutions," he says.

Donald Trump didn’t quite get the clean sweep he hoped for, but will Nikki Haley’s Vermont win be enough to keep her in the race?

The Americast team discuss the issues that mattered most to voters on Tuesday, namely immigration and the economy, and how the race has become a battle of the incumbents.

• Catch the episode here

As well as the 15 states today, also voting today is American Samoa - a US territory in the Pacific.

We've had the results from there, which show Joe Biden has lost in the territory - his first loss of the night.

Who was the winner? It was an entrepreneur named Jason Palmer who won by 11 votes.

While Palmer received 51 votes to Biden’s 40 - a share of 56% versus Biden’s 44% - they share the territory’s six delegates, three each.

This has happened to Biden before. In its last Democratic primary in 2020, the islands backed Mike Bloomberg for the nomination - with Biden coming second to last. There was a total of 351 votes last time.

Because it’s a territory, not a state, it can’t vote in the presidential election. But it can take part in picking candidates - and its Democratic caucus is today. Its Republican caucus is on Friday.

Donald Trump is projected to win Utah, CBS news, the BBC's US partner is reporting.

It's the final state to turn in its results tonight after a tight contest between the former president and Nikki Haley.

The victory means Trump has won all but one Super Tuesday state, after Haley clinched Vermont.

We've just been getting Mike Murphy's take on all of this - he's a political commentator and former political consultant to famous Republican campaigns such as John McCain and Arnold Schwarzenegger's.

"Mathematically, it's over for Nikki Haley", he tells BBC Radio 4's Today programme, adding "she's now entertainment".

Her campaign identified a weakness in Donald Trump, however, "she's putting on the most entertaining dead cat bounce in American politics," he says.

On Trump's cascading victories on Super Tuesday, Murphy says it shows he has "kept an iron lock on the Republican voter base".

For the Democrats, Murphy says "a normal Democrat could beat Donald Trump fairly easily, he's damaged goods, the problem is Biden is in a very weak position politically".

"Fair or unfair, people blame him for the perception of a weak economy," Murphy says, adding Biden needs to move the perception of the economy and his age/ vigour to increase his popularity.

Donald Trump is projected to win the Republican primary in Alaska, CBS news, the BBC's US partner, is reporting.

It's one more to add to the tally for the former president.

Images generated by artificial intelligence (AI), are one of the emerging disinformation trends ahead of the US presidential election in November.

Following an investigation, the BBC discovered dozens of these fake images circulating on social media.

Watch as our disinformation correspondent Marianna Spring explains what you need to know to spot these AI fakes.

Image source, .

These results almost guarantee that the sitting president, a Democrat, and his Republican predecessor will face off in November - in a rematch of the 2020 election.

And yet, for months, opinion polls have suggested a majority of Americans are not keen on another Biden-Trump contest in November.

We asked members of our US voter panel who are not very enthusiastic about the candidates on offer how they felt in 2020 - and what's changed in the years since.

• Read the piece here

Image source, Getty Images

Vice President Kamala Harris has claimed Super Tuesday is "an energising moment" for the Biden-Harris campaign.

"Americans of all backgrounds are showing that they sense the urgency of this election, and that they are ready to stand with President Biden and me in this fight to protect our fundamental freedoms," she said, adding Donald Trump "must be stopped".

"The president and I know re-election must be earned, and we will continue to put in the work to reach every possible voter," Harris added. "Winning the fight to protect our fundamental freedoms will require nothing less.”

Jemma Crew
Live reporter

Welcome to readers joining us again from outside the US. It's Jacqueline Howard and me in London, now taking over from the team in Washington DC to chew over Super Tuesday.

• President Joe Biden and Donald Trump are sweeping the state primaries that were held yesterday, according to projections by our US partner, CBS News
• To recap: Super Tuesday is the biggest voting day in America ahead of the election itself
• This time, more than a dozen states held nominating contests - in which Republican and Democratic voters selected the person they wanted to lead their party into the presidential election
• With voting now concluded across the US, Biden and Trump are each projected to have won nominating competitions in more than a dozen states, which would put each man in a near-unassailable lead in his quest to win the official nod from their party to run for the presidency
• So, this all makes a Trump-Biden rematch for the White House even more likely in November
• But Trump's remaining challenger Nikki Haley has managed to spring a surprise in the small north-eastern state of Vermont, where CBS projects she will beat Trump and notch only the second win of her campaign so far.

The story of the nightpublished at 06:06 Greenwich Mean Time 6 March

06:06 GMT 6 March

Sarah Smith
North America editor

Both Donald Trump and Joe Biden were denied total victory in the Super Tuesday races. Trump must be annoyed by Nikki Haley’s surprise win in Vermont. Biden probably didn’t anticipate being beaten in American Samoa by the entrepreneur Jason Palmer, as is being projected in US media.

But neither of these hiccups stood in the way of both the front-runners solidifying their positions as their party’s candidates. They are both now focused on attacking each other as the general election campaign has essentially begun – eight months before the vote.

The results did throw up some warning signs for both candidates, highlighting their potential weaknesses.

Biden should be worried about the exit polls that suggested the issue voters care about most is immigration and the southern US border. That is Trump’s signature issue and it was the main focus of his victory speech last night.

He may also be concerned about the “uncommitted” vote in some states, fuelled by voters' anger about the president’s support for Israel’s war in Gaza. Those same people might refuse to turn up to vote for Biden in November, or switch their support to a third-party candidate.

Trump’s long list of primary wins demonstrates his domination over his party - but Haley has attracted a significant chunk of Republican primary voters, many of whom say they will not switch to supporting Trump.

The former president made no attempt to woo Haley voters in last night’s speech, making no mention of his rival.

While Haley appears to be preparing to pull out, she may not be ready to endorse Trump.

President Joe Biden and Donald Trump swept the state primaries held on Super Tuesday - making a presidential rematch between them even more likely.

While Nikki Haley is projected to win the Vermont primary, Trump is the expected winner of at least 12 Republican contests, which further cement his strong overall lead over his rival.

Sumi Somaskanda
Chief presenter, reporting from California

Image source, .

As we just reported, CBS News projects that the closely-watched US Senate race in California is now down to two. Rep Adam Schiff (a Democrat), and former LA Dodgers baseball star and Republican Steve Garvey will advance and face off in November for the seat held by the late Senator Dianne Feinstein.

At the University of Southern California watch party we’re attending, there was something of an audible gasp as the initial numbers in this Senate race came through.

This heavily Democrat crowd didn’t seem to anticipate that Garvey would garner as much of the vote as he did. Still, California is a staunchly Democratic stronghold and Schiff is likely to beat Garvey easily in November.

Sam Cabral
US reporter

Image source, Getty Images

Tonight we're getting results from California's Senate primary race to replace Dianne Feinstein, who died last year. The state holds what is known as a jungle primary, in which candidates of all parties compete and the top-two finishers earn the right to a head-to-head this November.

Three Democratic members of Congress in Washington - Adam Schiff, Katie Porter and Barbara Lee - participated in the primary.

But while Schiff - a prolific fundraiser who gained a national profile in the Trump years - pulled away from the pack, Porter and Lee split progressive voters. That led Steve Garvey, a former baseball star for the Los Angeles Dodgers running on the Republican ticket, to leapfrog them in polling.

The predictions have now become reality, as CBS projects Schiff and Garvey will finish in the top two tonight.

The outcome is exactly what Schiff wanted. Polls show him easily beating Garvey in the Democrat-dominated state's general election and the congressman ran ads boosting the Republican over his left-wing challengers.

Image source, Getty Images

It's probably fair to say tonight has largely gone as we were expecting - without too much additional drama, and the likely showdown in this year's presidential election now looking all the more certain.

• President Joe Biden and Donald Trump are sweeping the state primaries that were held on Super Tuesday, according to projections by the BBC's American partner, CBS News
• Each is expected to have won their respective nominating contests in more than a dozen states
• That makes a rematch between the two for the White House even more likely. Both have been in competition for delegates (awarded after victory in state primaries), and are inching towards an unassailable lead in the respective Democratic and Republican contests
• But Nikki Haley has managed to spring a surprise in the north-eastern state of Vermont, where CBS projects that she will beat Trump and notch only the second win of her campaign so far
• Voting has now closed in all 15 of the US states in which primaries were held on Tuesday. A mail-in Democratic contest was earlier held in Iowa, and American Samoa has also held a Democratic caucus

Polls have now closed in Alaska - and with that, voting is now over for Super Tuesday.

We'll be on standby for any projections we get from Alaska, as well as for the other remaining results we're waiting for from the Republican primary in Utah, and from the US territory of American Samoa.

Bernd Debusmann Jr
US reporter

Image source, Getty Images

Nikki Haley is now projected to win Vermont, her first win on Super Tuesday and only the second victory of her campaign after Washington DC - which is a district, not a state.

But how did this come to pass?

For one, Vermont's Republicans are considered to be largely moderate when compared to the Trump-aligned wing of the Republican Party.

For weeks, Haley has pointed to New England's moderate Republicans as evidence that she has support, calling it "fertile ground".

Among those who has supported her campaign there is Governor Phil Scott, a Republican who has become a vocal critic of Trump.

Additionally, Vermont has an "open" primary, meaning that Democrats and Independents were able to cast their votes for Haley in a bid to hurt Donald Trump.

Nikki Haley has finally denied her Republican rival a clean sweep by squeaking out a narrow victory in the state of Vermont, according to the projection by CBS News.

The former UN ambassador and South Carolina governor is not expected to deliver remarks tonight.

But, in a statement, a campaign spokesperson said: “We’re honoured to have received the support of millions of Americans across the country today, including in Vermont where Nikki became the first Republican woman to win two presidential primary contests."

Donald Trump, who is now marching to the nomination, did not acknowledge Haley in his speech earlier - but Haley's campaign makes reference to Trump. She says there's a "large block of Republican primary voters who are expressing deep concerns" about him in state after state.

"Unity is not achieved by simply claiming ‘we’re united’," the statement adds, referring to claims Trump's made in the past that the Republican Party is united.