Billionaire was a live contender before disastrous debate punctured primary hopes

Billionaire withdraws from Democratic race after failing to attract voters on Super Tuesday

Voters choose moderate alternative to Bernie Sanders in race to unseat Trump

Klobuchar and Buttigieg to endorse Biden as Sanders remains the front-runner

Minnesota senator expected to endorse former vice-president ahead of Super Tuesday voting

Joe Biden gets huge boost in South Carolina which he long argued would be his ‘firewall’

Ex-US vice president’s victory now puts him close behind Sanders in Democratic race

Company, which certifies buildings in terms of internet connectivity, expands in Dublin

Two polls this week showed his three-month campaign has suddenly picked up speed

US president tells campaign rally he wonders if ‘we can get Gone With The Wind back’

The billionaire’s wealth means he will remain a contender, but his first real exposure has left him weakened

President’s Las Vegas rally on Friday occurs on eve of Democratic Party Nevada caucuses

Pilita Clark: Social media can be risky but authenticity on such platforms is rewarded

Democrats face a difficult road to find a candidate and challenge Trump in a such a polarised country

Former vice-president cannot afford to trail for a second time in Tuesday’s Democratic contest

Planet Business: The week when Johnson unleashed himself again

Ex-press secretary says working for president was a mistake but he will be hard to beat

US politics: Range of presidential hopefuls is sign of party weakness – not strength

Results debacle a painful reminder of 2016 and raises question of legal challenges

Thomas Buberl explains the opportunity in risk and instability, and how Brexit could have been avoided

Democratic hopeful tells supporters his campaign has more donors than Trump’s

US presidential hopeful Bloomberg vows first 100 days in White House about building team

America Letter: Targeting of Pete Buttigieg underlines his status as the one to watch

Edward Luce: None of candidates hoping to beat Trump looks like uniting a disparate base

US Politics: Left’s takeover of Democratic party is slower and patchier than anticipated

Businesses taking lead in climate emergency as warnings get more shrill

‘I’ve been pleasantly surprised that Trump has done exactly what he promised’

Former Republican and NY major’s vast wealth exceeds that of Trump

South Bend, Indiana mayor on backfoot after joining front runners for presidential ticket

Financial data giant continuing to support loss-making Irish enterprise software unit

Billionaire Michael Bloomberg may take on billionaire Donald Trump. How has it come to this?

US politics: Democrats have a serviceable array of candidates but not a person of elemental magnetism

Former Republican New York mayor preparing to enter Democratic primary contest

San Francisco-based company is thought to be laying the groundwork for a direct listing rather than an IPO of shares

Secretary general welcomes 77 countries’ commitments to net-zero emissions by 2050

E-cigarette was supposed to be future of tobacco but six deaths have abruptly challenged that assumption

Adherents for cold workouts say they can reduce dehydration and inflammation

The real office throne: Why the most private room in the office can influence bottom line

Pilita Clark: A planned global action in September will test corporate resolve on the issue

Investment strategists concerned by Trump’s unpredictable trade policy