People enjoy the music during a Hurricane Katrina 10th anniversary event at the Smoothie King Center on Saturday, in New Orleans, Louisiana. Photograph: Getty

From the Lower Ninth Ward to the Super Dome, New Orleans launched a day of events on Saturday to commemorate the 10th anniversary of Hurricane Katrina(...)

US  presidential candidate Donald Trump at Manhattan Supreme Court in New York on Monday, where he appeared for jurty duty. Trump’s  hard line on immigration has driven rivals to match his biting anti-immigrant language. Photograph: Lucas Jackson/Reuters

Republicans thought they had learned a lesson after 2012: Turning off Latino voters ensures defeat in the general election. But as the disruptive US p(...)

 US president Barack Obama announcing a  plan  to reduce greenhouse gas emissions from  coal-burning power plants. Photograph: Mark Wilson/Getty Images

The Obama administration has vowed to override states that refuse to accept its new climate goals by mandating how they should achieve emissions cuts,(...)

Ahead of the field: Donald Trump in Texas on Thursday. He said he’s confident of winning the Hispanic vote. Photograph: Matthew Busch/Getty

On Tuesday the Republican senator Lindsey Graham, one of 16 candidates seeking his party’s presidential nomination in the 2016 US elections, appear(...)

 Pooja Mandagere (left) and Natalie Thompson celebrate  outside the US Supreme Court following the announcement of the ruling  that the constitution guarantees a nationwide right to same-sex marriage.  Photograph: Doug Mills/the New York Times

US president Barack Obama hailed a Supreme Court ruling legalising same-sex marriage across the country as a “victory for America.” The ruling mean(...)

Lindsey Graham, a three-term senator from South Carolina, cited the increasing violence in the Middle East as motivation for his decision to run. Photograph: Win McNamee/Getty Images

Senator Lindsey Graham, a foreign policy hawk, has become the latest Republican to join the party’s fast-growing field of presidential candidates. Mr (...)

Nigel Farage, leader of the United Kingdom Independence Party, addresses the 42nd annual Conservative Political Action Conference. Photograph: Alex Wong/Getty Images

Nigel Farage, leader of the UK Independence Party, was warmly received at a major US conference of conservatives with a message denouncing EU immigra(...)

Former US president George W Bush speaks at the launch his new book, “41: A Portrait of My Father”, at the George Bush Presidential Library Center in College Station, Texas. Photograph: Mike Stone/Reuters

George W Bush, the 43rd president, unveiling his new biography of his father, 41st president, George HW Bush – a book he describes as “a love story” –(...)

Daniel Smith, who was at the March on Washington when Martin Luther King made his “I have a dream” speech in 1963. Photograph: Christopher Gregory/The New York Times

Fifty years ago Washington DC had braced itself for the worst. The day before the March on Washington, the District of Columbia cancelled sales of alc(...)