US Republican presidential candidate Donald Trump at a campaign rally in Keene, New Hampshire, on Wednesday, during which he said he would send home the US’s Syrian refugees if he became president. Photograph: Gretchen Ertl/Reuters

Businessman Donald Trump, the frontrunner to win the 2016 Republican presidential nomination, said he would send home the US’s Syrian refugees if he b(...)

Wisconsin Governor Scott Walker announced on Monday that he was suspending his bid for the Republican presidential nomination. Photograph: Ben Brewer/The New York Times. 1:39

Republican Governor Scott Walker of Wisconsin abruptly pulled out of the 2016 US presidential race on Monday, doomed by a lightning-quick collapse (...)

Republican presidential hopefuls Donald Trump (left) and Jeb Bush high five during the Republican presidential debate at the Ronald Reagan Presidential Library in Simi Valley, California. Photograph: Frederic J Brown/AFP/Getty Images 0:35

Republican frontrunner Donald Trump drew fire from rivals during the party’s second presidential debate over his campaign insults with Carly Fiorina, (...)

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(...)

Republican presidential candidate and former Florida Governor Jeb Bush says the retirement age should be pushed back to “68 or 70”. Photograph: Gretchen Ertl/Reuters

Something strange is happening in the Republican primary – something strange, that is, besides the Trump phenomenon. For some reason just about all th(...)

US marines raise the US flag while watched over by secretary of state John Kerry at the US embassy in Havana. Photograph: Reuters

The US and Cuba have stopped “being the prisoners of history”, John Kerry said yesterday, as he watched his country’s flag being raised at its embassy(...)

The flag which came down on January 4th 1961, will go up again today. The Havana US embassy reopens in the building it left on that day. Since 1977 it(...)

 US president Barack Obama: his signature healthcare policy was mentioned nine times during  last week’s prime-time Republican debate. Photograph: Mark Wilson/Getty Images

What did the men who would be president talk about during last week’s prime-time Republican debate? Well, there were 19 references to God, while the e(...)

Donald Trump speaking to the media after the first Republican presidential debate. A feud with Fox News moderator Megyn Kelly has failed to dent his popularity, according to a Reuters/Ipsos poll. Photograph: Andrew Harrer/Bloomberg

Donald Trump continued to defy the laws of political gravity on Monday as a Reuters/Ipsos poll found the real estate mogul holding on to a wide lead (...)

US presidential candidate  and businessman Donald Trump. Photograph: Brian Snyder/Reuters

Embattled Republican presidential candidate Donald Trump has hit back at critics who say he went too far with caustic comments about a US television n(...)