Nikki Haley has announced she is suspending her campaign - but says she has "no regrets".

She opens her speech on Wednesday by saying: "Just over a year ago I launched my campaign for president, when I began, I said the campaign was grounded in my love for country.

"Just last week, my mother, a first generation immigrant, got to vote for her daughter for president. Only in America."

Brandon Drenon
Reporting from Washington DC

Image source, Reuters

With Nikki Haley expected to formally suspend her presidential campaign after being defeated in several US states by Donald Trump, experts will be listening in for one key question: Will she endorse the former president?

In recent weeks, Haley's attacks on Trump sharpened as she warned another Trump presidency would mean four more years of "chaos".

She is not expected to endorse him today, but rather urge the former president to win over the independents and moderate Republicans who kept her in the race.

She recently told US media she would not honour her commitment to the Republican National Committee that required her to pledge support to the Republican nominee.

In her speech, she is likely to thank supporters, highlight her victories in Washington DC and Vermont as evidence of Republican voter's discontent with Trump, and keep her future political options open.

So far, Haley is not among those mentioned as a possible vice president pick for Trump, and she has previously said she would not want the role even if it was offered.

Former South Carolina governor Nikki Haley will deliver a speech shortly, in which she's expected to announce her decision to pull out of the race for the Republican nominee - leaving Donald Trump as the last candidate standing.

Pundits will be watching out for what she has to say about her rival Trump, with whom she has traded personal barbs and insults in recent weeks on the campaign trail.

More pertinently, where do Haley's typically more moderate backers go now, and can the former president win them over?

You can watch her speech live from 10:00 EST (15:00 GMT) by clicking the play button at the top of this page.

As the presidential race gears up, Republicans who were holding out for a Nikki Haley nomination are having to review their options - ahead of the all-but-certain 2020 Biden-Trump rematch.

They include Jim Sullivan, a 52-year-old Republican from Indiana, who previously told the BBC Haley had "a better chance in the general election against President Biden, but it's clear she's not going to survive in the Republican race".

Haley was a 'last hope' for many voters - so what now?published at 14:25 Greenwich Mean Time 6 March

14:25 GMT 6 March

Nomia Iqbal
North America Correspondent

Nikki Haley has had quite the evolution, from being a Trump supporter to his arch rival.

For many of her supporters she was seen as the last hope, and the standard bearer for those Republicans worn out by Trump and those who never much liked him.

So what happens to them now?

On the primary campaign trail, some told me they could not bring themselves to vote for President Biden and would hold their noses for Trump - others saying the opposite.

However, there is a possibility these voters may sit it out. It wouldn’t be a surprise given that polls suggest many Americans aren’t enthused about the inevitable rematch of 2020.

History gives us some clues though. It is likely many Republicans will overlook the messy primaries and get behind Donald Trump in November.

But President Biden and his campaign will be on the lookout for weaknesses, especially in those key battleground states where the election is ultimately won.

Trump suffered losses in suburban areas in 2020 and with her year long run against him, Nikki Haley has exposed them as his potential weaknesses once again.

In February 2023, Nikki Haley described her campaign for election as "the last-best hope of stopping the Trump-Biden nightmare".

She announced her run for the Republican nomination, despite previously insisting she had no plans to run against her former ally Trump.

More recently, their relationship has descended into a trade-off of political insults. Here we look back at some of the highs - and lows - of Haley's ambitious offensive.

Brandon Drenon
US reporter

Nikki Haley is expected to announce her resignation from the Republican primary presidential race this morning.

However, her departure from the race comes just two months after federal records showed that her campaign for president had $14m (£11m) in cash to spend.

Her campaign will have certainly spent some of that since January, but what happens to the rest of it?

Leftover funds can be transferred to other candidates’ races, political parties, charities, and political action committees (PACs). And the final destination of the money often provides a glimpse into a candidate’s future political ambitions.

The extra cash is often used to run for office again, and candidates only typically donate the leftover funds when their life in public service is nearing its end.

It can also be spent for personal use, but that's where things get sticky.

“You couldn’t use it just to buy pizza dinner on a Saturday night with your family,” Michael Kang, Northwestern Law professor, told NBC News. But, you might be able to spend funds on a pizza dinner for campaign staff at work, he added.

As the countdown begins to yet another face-off between President Biden and Donald Trump, the BBC asked members of our US voter panel how far the contest will differ this time round.

Shloka Anantharayanan, a 37-year-old Democrat from New York, cited the physical difference in going to the polls - four years on from the height of the Covid pandemic.

But she said wars, in Ukraine and Gaza - and what the consequences may be for the wider world - meant voting still carried a "life-and-death" significance.

Trump's essential task will be to win over Haley's voterspublished at 13:33 Greenwich Mean Time 6 March

13:33 GMT 6 March

Anthony Zurcher
North America correspondent

Image source, Getty Images

With Nikki Haley’s impending announcement that she will suspend her presidential campaign, Donald Trump is now the last candidate standing for the Republican nomination.

It completes a dominating march through the early primary states, with his only losses coming to Haley in the District of Columbia and, last night, in Vermont.

According to US media reports, Haley is not planning to endorse Trump during her morning speech confirming her withdrawal, instead opting to tell the former president that he must convince her Republican and independent voters to support him in the November general election.

That will be an essential task for Trump, as he needs the kind of suburban, moderate, college-educated voters who made up Haley's coalition if he wants win back the presidency.

With Joe Biden also steamrolling toward his renomination, the two major-party candidates can now fully pivot toward each other and what is shaping up to be one of the longest general election campaigns in US history.

Both candidates have already painted a dark picture of what is in store if their opponents win.

Expect more of that over the coming months, as they hop between the handful of pivotal battleground states that will determine who gets to occupy the White House for the next four years.

For months, opinion polls have suggested that many Americans are not keen on another Biden-Trump contest in November.

Chief among their concerns is the age of the two presumed presidential nominees: Joe Biden is 81, Donald Trump will be 78 by the time of the 2024 election.

Kathleen McClellan, a Republican from Louisiana, told the BBC she will reluctantly vote for Trump - in the face of little alternative.

Image source, Reuters

So, aside from the much-forecast conclusion, to be confirmed next week, of a prospective rematch between Biden and Trump come November, what else did we learn from Super Tuesday?

• Trump posted a dominant performance, with some staggering victories - a 70% margin in Alabama, 61% in Texas, some 70% of the vote in California
• Exit polls showed strong backing among voters over Trump's take on immigration - a topic that has been at the forefront of Trump's political agenda since 2015

• But there were indications of continued disaffection with the former president, particularly among young, suburban and college-educated voters who chose Nikki Haley
• Haley's surprise win in Vermont can be chiefly credited to a campaign which pulled together anti-Trump voters from all factions. But there simply weren't enough of them. Now she looks set to drop out of the race, how will it affect the Republican base?
• Backing for President Biden was shaken by a notable Gaza protest vote in Michigan last week, and the phenomenon reared its head again in states such as Minnesota and North Carolina - a significant percentage of voters registered as 'uncommitted' or 'no preference'

Want to know more? Our North American correspondent Anthony Zurcher has all the details here.

Donald Trump still needs 171 more Republican delegates to officially clinch the presidential nomination, but he won't struggle to secure them.

March still includes a number of Republican primary contests, including Hawaii, Mississippi, Guam, Arizona and Florida.

This means he's likely to win the nomination within just two weeks.

Biden, meanwhile, has secured 1,497 of the 1,968 delegates he needs to win.

There aren't enough delegates for him to reach this threshold until 19 March, when Arizona, Florida, Illinois, Kansas, Ohio are holding their primary contests.

Image source, Reuters

A rematch of the 2020 presidential election in the US is now all but certain.

With Haley expected to drop out of the race, Donald Trump would be the sole remaining Republican candidate for president.

He is set to face off against incumbent President Joe Biden in a race that polls suggest US voters on the whole are not pleased with.

Surveys indicated a majority of voters did not think Biden or Trump should seek re-election.

Some remain concerned about Biden's age (81) and Trump's many criminal indictments.

Haley's decision to drop out of the presidential race follows defeat after defeat to Donald Trump in the Republican primary contest.

She had only won two primaries so far, in Washington DC, as well as a surprise victory in Vermont last night.

While Haley avoided insulting Trump in the early days of her campaign, she took on her rival more directly in recent weeks, arguing he was "unhinged" and unfit for office.

She is not expected to endorse him this morning, and will instead encourage him to appeal to her voters, according to reports.

Holly Honderich
US reporter

Image source, Getty Images

The promise of Nikki Haley’s campaign was two-fold: first, that there were enough never-Trump and Trump-fatigued Republicans still sitting inside the Republican party to overtake the front-runner and, second, that Haley would be the candidate to build that coalition.

She was right about the second part. Despite the long odds, the collective eye roll when she first announced her run last year, the former South Carolina governor used a mastery of retail politics and a steely discipline to become Trump’s last viable alternative.

And on the campaign trail, voters told me repeatedly they were impressed by Haley’s evident intelligence, her command of foreign policy and - above all - her tone.

But the problem for Haley - like all those who fell before her - was the first part of her promise: beating Trump.

Her exit proves what many already expected: the ceiling for any candidate other than the former president is simply too low to overcome his devoted and energetic base.

Haley plans to deliver remarks around 10:00 EST (15:00 GMT) announcing she is suspending her presidential bid.

It comes after Haley won only the state of Vermont among 15 states from Super Tuesday.

Nikki Haley is dropping out of the presidential race on Wednesday.

Good morning to those of you up and about early in the US. Our Washington DC team is back in the driver's seat after our London colleagues steered us through the results from those straggler states through the night.

With all the votes in - bringing a couple of surprises - there's plenty to talk about, so stick with us as we digest Super Tuesday.

• You can check how each of the candidates did in our round-up post here.

Image source, Reuters

A large financial donor to Nikki Haley's campaign, Jay Lefkowitz, says Donald Trump is a "radical populist" and "isolationist", and "millions" of voters will be dismayed if they are forced to choose between him and Joe Biden.

Lefkowitz, who is a lawyer and a former adviser to George W Bush, told the Newsday programme Haley could capitalise on uncertainty surrounding Trump.

"There's just so much uncertainty around Trump, if I was in Nikki Haley's shoes and I was getting the kind of support that she has been getting, I would stay in the race."

• Listen to to the full interview with Lefkowitz here

Katty Kay
US special correspondent

Image source, Getty Images

This election campaign is being watched not just in the US but around the world.

After spending a few weeks in Europe in January, the subject of America's presidential election was a constant topic of intense curiosity and concern among the people I spoke to. And no wonder.

The US is currently involved in two hot wars, Ukraine and Gaza. Meanwhile, US-China relations have deteriorated and tensions in the Asia Pacific region have risen.

Closer to home, Central American nations are under the spotlight as a growing number of migrants are trying to get to the US through a border which seems more porous by the day. And last month there were more US-led air strikes against Houthi rebels in Yemen.

There is almost no area of the world where American leadership doesn't matter.

• Read more election analysis from our US special correspondent, Katty Kay