US president Barack Obama: “We only get one home. We only get one planet. There’s no plan B.” Photograph: Zach Gibson/The New York Times

President Barack Obama yesterday challenged the United States and the rest of the world to step up efforts to fight global warming, at the formal unve(...)

Iranian president Hassan Rouhani: “This is a new page in history,” he said, reiterating that the deal had launched a phase of reconciliation with the outside world. Photograph: Atta Kenare/AFP/Getty Images

Iranian president Hassan Rouhani defended Iran’s nuclear deal with world powers after it came under attack from conservatives at home, arguing on T(...)

Man  holds a confederate battle flag and Bible outside the statehouse in Columbia, South Carolina, on Thursday, just hours before Gov Nikki Haley signed a Bill to remove the flag from statehouse grounds. Photograph: Jason Miczek/Reuters

The Confederate battle flag, which has reignited a national debate since last month’s killings of nine black churchgoers in South Carolina, is to b(...)

Minister for Foreign Affairs Charlie Flanagan spoke about the plight of undocumented Irish in the US. Photograph: Dara Mac Donaill/The Irish Times

Minister for Foreign Affairs Charlie Flanagan has said the plight of undocumented Irish in the US is “not just a St Patrick’s Day issue”. Along with T(...)

President Barack Obama: ‘This law is now helping tens of millions of Americans.’ Photograph: AP Photo/Pablo Martinez Monsivais

For years, US president Barack Obama has faced the sneers of political adversaries who called his health care law Obamacare and assailed his effort to(...)

Pope Francis has  warned that failure to act over climate change would have “grave consequences for all of us”. Photograph: Getty

Pope Francis will this week call for changes in lifestyles and energy consumption to avert the “unprecedented destruction of the ecosystem” before the(...)

Almost three weeks after President Barack Obama said the US was not losing to Sunni extremists in Iraq his administration is sending a further 450 (...)

Potential Democratic presidential nominee Hillary Clinton  at Columbia University in New York. Ms Clinton has  voiced her support for immigration reform in the US during a fundraising function. Photograph: Brendan McDermid/Reuters

America’s immigration problem needs to be addressed, in a way that helps families, potential Democratic presidential nominee Hillary Clinton has sa(...)

Obamacare is working better than even its supporters expected – but its enemies say that the good news proves nothing, because nobody predicted anything different

Imagine yourself as a regular commentator on public affairs – maybe a paid pundit, maybe a supposed expert in some area, maybe just an opinionated bil(...)

President Barack Obama with Israeli prime minister Binyamin  Netanyahu. The White House has castigated  Netanyahu for comments made on the election stump. Photograph:  Jason Reed/Reuters

It is fair to say that relations between the United States and Israel are at their poorest in decades. Allegations of spying, interference in domestic(...)