Sam Cabral
US reporter

Image source, EPA/Getty Images

We reported earlier that North Carolina's controversial Lieutenant Governor Mark Robinson is projected to win the Republican nomination to be his state's next governor.

Now CBS has projected that Josh Stein, the state's attorney general, has won the Democratic nod in that race and will face Robinson in November.

Stein's face-off with Robinson, who he has cast as an extreme "culture warrior", is expected to be the most expensive race outside of the presidential election.

Meanwhile in Texas, Senator Ted Cruz ran unopposed for the Republican nomination and has formally earned the right to run for a third term.

Cruz - a former presidential candidate - narrowly won re-election in 2018 and is again being viewed by Democrats as among their most vulnerable opponents.

He is likely to face Colin Allred, a former NFL player and current three-term US congressman from Dallas. The Democratic primary tonight has not yet been called.

Time for a quick recap.

President Joe Biden and Donald Trump are each projected to have triumphed in their respective party's nominating contests in several states tonight. That's based on information from the BBC's American partner network, CBS News.

Both of them will be awarded delegates. The more delegates they get, the closer each competitor gets to earning the official nod from their party to contest the presidential election later in the year.

For the Democrats:

• Biden is so far projected to have won nominating contests in 11 states that voted on Tuesday: Alabama, Arkansas, Colorado, Maine, Massachusetts, North Carolina, Oklahoma, Tennessee, Texas, Vermont and Virginia
• He was also confirmed tonight by his party to have won an 12th state, Iowa, where people have been able to vote in a caucus by post since January

For the Republicans:

• Trump is so far projected by CBS to have won nominating contests in nine states: Alabama, Arkansas, Colorado, Maine, North Carolina, Oklahoma, Tennessee, Texas and Virginia
• One state - Massachusetts - have been characterised as "leans" Trump

Emma Vardy
Reporting from Colorado

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We’re getting the first signs of how many Democratic voters decided to opt for a protest vote against Joe Biden in Colorado.

Colorado is one of six states with a “uncommitted” option on the Democratic ballot. It’s a campaign by some Democrats who want to send a signal that they are unhappy with Joe Biden’s handling of the Israel Gaza war.

So far “uncommitted” voters have notched up around 7% of the Colorado vote.

It was never expected to be enough to threaten Biden’s chances at becoming the Democratic nominee, but it creates unwanted attention for him at a time when he needs the party to be united to challenge Donald Trump.

Voters opting for the protest option admitted they would still vote for Biden in the eventual presidential election, but that they want to try to send a message to the party that they want Biden dropped in favour of a different candidate, however unlikely that is in reality.

Trump is projected to win in Colorado, the state that had tried to strike him from the presidential ballot before it was overruled by the Supreme Court on Monday.

Biden also wins his race in the state, our US partner CBS News reports.

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The Republican primary contest in Massachusetts is now being characterised by the BBC's US partner CBS as "leans Trump".

"Lean" is one term used by CBS to describe how the contest is looking in a particular place. It means a marginal lead for a particular candidate - with the caveat that this could change as the night wears on.

As projected results continue to arrive, a quick reminder that we're bringing you live coverage in not only text form, but video too.

For reaction to what's happening tonight, stream our special programme by clicking the play button at the top of this page. You'll be able to hear from our correspondents in California, Virginia, Colorado and Washington DC.

Another projection from our US partner, CBS News, this time for Alabama where polls closed more than an hour ago.

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Sam Cabral
US reporter

Image source, EPA

Super Tuesday is already on track to put Donald Trump within striking distance of the Republican Party's nomination for president - but it will not quite crown him the presumptive nominee.

That is because the Republican nominee needs to win 1,215 delegates - a majority of those available nationwide - in order to clinch the presidential nod.

Mathematically, while Trump is racking up the wins so far, he will not reach that threshold tonight.

By the end of Super Tuesday contests, however, Trump will likely have accumulated more than 1,000 delegates - and election watchers are predicting he will lock up the nomination after the Georgia primary on 12 March.

Our partners at CBS News have calculated that, for Nikki Haley to prevent that from happening, she must win at least 97 delegates tonight. But so far, she appears to have won a mere three in Virginia.

The next batch of states have closed their polling stations - in Colorado, Minnesota and Texas.

After this, we've just got three more states to close - California and Utah, whose polls close at 23:00 ET (04:00 GMT), and then Alaska, which finishes at 00:00 ET (05:00 GMT)

Results are now being projected from our US partner CBS News in Arkansas - marking more wins for the two front-runners.

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They say “everything is bigger in Texas”, and it’s often true. The Lone Star State is America's second-biggest economy and second-biggest state by size, population, and delegate count.

How many delegates? Texas Republicans have 161 delegates. The state’s Democrats have 273 delegates.

Who will do best? Donald Trump is expected to stretch his commanding lead over Nikki Haley in this deeply Republican state. Joe Biden will very likely win among Democrats.

Key issue among voters? Immigration is a key issue for many voters in Texas, which shares a border with Mexico. Migrant encounters at the US-Mexico border hit a record high in 2023. Border agents there tallied nearly 250,000 encounters with migrant crossings in December.

One piece of context: Texas officially became a minority-majority state in 2022, with Hispanic residents surpassing white residents and accounting for more than 40% of the state’s population. It’s a statistic that may offer Democrats hope.

Hispanic voters are typically Democratic-leaning. However, Republicans here have historically had an iron grip. A Democratic presidential candidate hasn’t won the state since 1976.

Angelica Casas
Reporting from Texas

I'm in Texas, a historically Republican state, where I've been speaking to Kimi King, a political scientist at the University of North Texas. She says three things have become clear to her here:

1. Voter turnout is lower than usual. It’s likely due to a few different things, she says - reduced enthusiasm for the presidential election, no real competitive state-wide races and new voting rules around mail-in ballots.
2. Immigration is a top issue, not just for Republicans. ”Besides the economy in Texas, there are three main issues: immigration, immigration, immigration,” King says. “Even Democrats are concerned about the situation at the border.”
3. Some Democrats are voting in the Republican primary. Texas is an open voting state, meaning you can show up to any polling site on voting day and choose then what party primary you’ll vote in - regardless of whether you're registered with a political party. "In Texas, Biden will win [the Democratic primary]. So a vote for him might not matter," King says.

Kayla Epstein
Reporting from West Palm Beach, Florida

In the past, Trump’s supporters here in West Palm Beach have gathered on the bridge that leads to Mar-a-Lago, waving massive flags and sporting campaign merchandise.

But tonight, as Trump appears poised to vanquish any challenge to his nomination once and for all, the bridge is absolutely deserted save for a few fishermen - and John Skeadas.

John, 70, has a large “Trump 2024" flag, which billows in the coastal wind behind him. “I wasn’t invited to the gala!” He joked. “Though I wish I was.”

Inside the compound, Trump is holding a lavish party for his other supporters. But you wouldn’t know it from the road where all you hear, quite literally, are crickets.

The subdued atmosphere here really underscores this year’s somewhat anticlimactic Super Tuesday, where the candidates feel all but settled.

We've had another projection from our US partner, CBS News, who projects...

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The mountain state - which is traditionally Democratic - has been in headlines as of late for its court’s decision to kick Donald Trump off its ballots, citing 14th amendment laws which bar insurrectionists from running for office.

Earlier this week, the US Supreme Court unanimously ruled in favour of Trump, effectively reversing the decision and allowing him to run.

How many delegates? 37 for Republicans and 72 for Democrats.

Who will do best? Haley tends to perform better than Trump in Democratic states, but even with efforts to kick Trump off the ballot, his supporters in Colorado remained undeterred.

The former president remained on the ballot as his case before the US Supreme Court played out, and those who wanted to cast a vote for him can do so.

One piece of context: In Colorado’s primary elections, everyone can vote - meaning those unaffiliated with the Republican Party could cast their vote in the Republican presidential primary. How well Haley performs in this state could provide clues on Colorado’s overall support for Trump come November.

Anthony Zurcher
BBC North America correspondent

Image source, Reuters

As polls close in Super Tuesday states, Donald Trump keeps racking up comfortable victories over Nikki Haley - in Virginia, North Carolina, Tennessee and Oklahoma so far.

There’s one stubborn holdout, however. Up north in Vermont, Haley is staying neck-and-neck with the former president and could pull ahead for her second win of the primary season by the time the evening concludes.

The state wasn’t heavily polled prior to Super Tuesday, but the surveys that were done indicated that Trump had a comfortable lead. That clearly was not the case.

Haley’s strong showing shouldn’t exactly be a surprise, however. The state has a stubborn independent streak, and its Republican governor, Phil Scott, is an outspoken Trump critic who endorsed and campaigned for Haley.

“Whether you’re a Republican or one of the many independents, moderates and Democrats who supported me over the years, don’t sit this primary out,” he said at a rally with Haley in Burlington on Sunday. “Take a Republican ballot and vote for Nikki Haley.”

It appears that some Vermont voters – maybe even a majority – heeded that call.

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Our US partner, CBS News, has just projected that Biden has won his race in the state of Massachusetts.

Sam Cabral
US reporter

Image source, Getty Images

One of the most closely watched non-presidential races this year is the contest to elect the next governor of North Carolina, a battleground state once favoured by Democrats that is now slipping away from them.

Our partners at CBS News have just projected that Mark Robinson, the state's controversial lieutenant governor, will win the Republican nomination.

If Robinson wins in November, he will be the first black governor in North Carolina history and will bring all three branches of state government under Republican control.

A former furniture-maker who rose to prominence with a public speech in defence of gun rights, Robinson is a bombastic orator with a lengthy history of inflammatory remarks - from referring to the LGBT community as "filth" to endorsing antisemitic conspiracy theories.

But in a joint appearance at a rally in North Carolina on Saturday, his fellow Republican Donald Trump formally endorsed Robinson, calling him "Martin Luther King on steroids" in reference to the famed civil rights activist.

Robinson is expected to face the state's attorney general Josh Stein, a Democrat, in the November general election. Stein's race this evening is yet to be called.

We'll let you know who's projected to win there as soon as we do.