US senator Marco Rubio has announced that he is to seek the Republican nomination in the 2016 presidential election.  Photograph: Jim Lo Scalzo/EPA

US senator Marco Rubio of Florida told top donors that he will run for the White House because he is “uniquely qualified” to represent the Republican (...)

The nitrogen method of execution would require an inmate to be placed in a sealed chamber or to wear a special mask. The process would involve slowly replacing oxygen with nitrogen.  Photograph: Federal Bureau of Prisons/Reuters

The Oklahoma senate on Thursday passed a bill that would allow nitrogen gas as an execution method, a measure adopted after the flawed 2014 lethal-inj(...)

Indiana senate president David Long (left) and house speaker Brian Bosma during a press conference at the Capitol in Indianapolis. Photograph: Aaron P Bernstein/Getty Images

Republicans stepped back from Indiana’s “religious freedom” law as state lawmakers moved to change the legislation amid uproar that the anti-gay stat(...)

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(...)

Enda Kenny: “There’s an issue about the waiver scheme and the way it applies.” Photograph: Bloomberg

The Taoiseach, at the end of his remarks in the Oval Office next to Barack Obama, noted that it was “unique for a country as small as Ireland to ha(...)

US president Barack Obama receiving a bowl of shamrock from Taoiseach Enda Kenny during a St Patrick’s Day reception at the White House in 2012. The two men will meet again in Washington on Tuesday. Photograph: Chris Kleponis/Reuters

From afar it is easy to be cynical about the green beer and tweed caps of the celebration of St Patrick’s Day in the United States, but that cynici(...)

Taoiseach Enda Kenny

Simon Carswell in AtlantaTaoiseach Enda Kenny started his St Patrick’s Day trip to the United States by telling an audience of businesspeople in Atlan(...)

Hillary Clinton: Some say her use of a personal email account while secretary of state will most likely be forgotten long before the 2016 election. Photograph: The New York Times

The tweet wasn’t even a day old and it had been viewed more than three million times, according to social media website Twitter.“I want the public to (...)

Former US Secretary of State Hillary Clinton:   an investigative committee in the US House of Representatives will subpoena Clinton’s personal emails. Photograph:   Kevin Lamarque/Reuters

A growing controversy over Hillary Clinton’s use of personal email for work while she was US secretary of state could drag on for months, threatening(...)

Israeli PM Binyamin Netanyahu: Characterised a deal with Tehran as the antithesis to a farewell to arms. It would, he told Congress, “be a farewell to arms control”. Photograph: Bloomberg 1:35

Israeli prime minister Binyamin Netanyahu’s fighting speech to a joint session of the US Congress felt at times like a presidential state of the union(...)