Wisconsin governor Scott Walker   speaks at the Conservative Political Action Conference in National Harbor, Maryland, on Thursday. Walker’s  bitter fight against trade unions has cast him on to the national stage. Photograph: Jabin Botsford/The New York Times

Wisconsin governor Scott Walker received one of the loudest cheers of his speech at this week’s Conservative Political Action Conference (CPAC) when h(...)

Police perimeter tape at one of the scenes of the multiple shooting which took place on Thursday night in Tyrone, Missouri. Photograph: Michael Thomas/EPA

A man shot and killed seven people in a house-to-house shooting spree in a sparsely populated part of Missouri before shooting himself, the state High(...)

Marchers carry posters of Antonio Zambrano-Montes during a protest over his killing in Washington State. Photograph: Rajah Bose/The New York Times

Police officers who fatally shot a Mexican farm worker in Washington state after he pelted them with rocks fired 17 shots at the man, striking him fiv(...)

A pedestrian with his glasses fogged over walks through the snow during a winter blizzard in Cambridge, Massachusetts. Photograph: Brian Snyder/Reuters

Record-breaking cold gripped the Eastern United States on Monday as an icy winter storm crippled the nation’s central states before it was expected to(...)

Director of the Federal Bureau of Investigation James Comey: spoke candidly about race relations and the “disconnect” between black communities and US law enforcement. Photograph: Jim Watson/AFP/Getty Images

Federal Bureau of Investigations director James Comey used a speech at an American university to speak candidly about race relations and the “disconn(...)

A six-year-old boy’s mother, grandmother and aunt have been charged in the US after authorities said they staged his kidnapping.

A six-year-old boy’s mother, grandmother and aunt have been charged in the US after authorities said they staged his kidnapping because they wanted to(...)

A screengrab showing the police stop during which Jerame Reid was fatally injured. 1:40

A US police video of officers confronting and then fatally shooting a black man in southern New Jersey has stirred anger over another death at the han(...)

The US Supreme Court is to decide whether same-sex couples have a right to marry under the country’s constitution.   Vin Testa, a supporter of same-sex marriage, waves a rainbow colored flag outside the US Supreme Court  in 2013.  Photograph: Andrew Harrer/Bloomberg

The US Supreme Court is to decide whether or not same-sex couples have a right to marry under the country’s constitution, setting up a potentially hi(...)

Henry Allen jnr (left), president of the Colorado Springs NAACP, shows  James Simmons the spot where an improvised bomb exploded on Tuesday outside the group’s offices. Photograph: Matthew Staver/ New York Times

US law enforcement officials are investigating whether the fire-bombing of the offices of a civil rights group, the National Association for the Adva(...)

 Maryland governor Martin O’Malley (left) with president Barack Obama. Mr O’Malley has cancelled death sentences for four prisoners. Photograph: Mandel Ngan/AFP/Getty Images.

A US governor has cancelled the death sentences of the last four inmates awaiting execution, almost two years after the state became the 18th to do a(...)