Republican senator Lindsey Graham speaks during the Republican presidential debate in Las Vegas, last week. Photograph: Mike Blake/Reuters

US senator Lindsey Graham, a respected conservative voice on defense and foreign policy issues, dropped out of the 2016 Republican presidential race o(...)

US Republican presidential candidate Donald Trump waves to supporters after a Pearl Harbor Day rally aboard the USS Yorktown memorial in Mount Pleasant, South Carolina. Photograph: Ramdall Hill/Reuters

None of the inflammatory verbal bombs that businessman Donald Trump has dropped since he declared his presidential candidacy six months ago have damag(...)

US Republican presidential candidate Donald Trump speaks to supporters at a Pearl Harbor Day rally aboard the USS Yorktown Memorial in Mount Pleasant, South Carolina on Monday. Photograph: Randall Hill/Reuters

Republican presidential frontrunner Donald Trump on Tuesday likened his proposal to ban Muslims from entering the United States to second World War po(...)

Hillary Clinton speaks about terrorism at the Council on Foreign Relations in New York, on Thursday. Photograph: Sam Hodgson/The New York Times

Democratic presidential frontrunner Hillary Clinton has called for more intensified and broader fight against Islamic State militants to include a no-(...)

Republican presidential candidate Ben Carson speaking during a Liberty University Convocation in Virginia on Wednesday. Photograph: Andrew Harrer/Bloomberg

US presidential candidate Ben Carson recommended praying for rival Donald Trump after the real estate mogul and television personality, in a 95-minute(...)

Republican presidential hopefuls Ben Carson and Donald Trump: a poll on Tuesday show Carson with a 26 to 22 per cent lead over Trump nationally in the race for the party’s candidacy. Photograph: Frederic J Brown/AFP/Getty Images

It’s first-time candidates Ben Carson and Donald Trump versus everyone else tonight, as the Republican Party has its third debate (8pm eastern time; (...)

Men on motorcycles inspect a site hit by what activists said were air strikes carried out by the Russian air force in the town of Babila, in the southern countryside of Idlib, Syria. Photograph: Khalil Ashawi/Reuters

The United States will largely abandon its failed efforts to train moderate Syrian rebels fighting Islamic State, and instead provide arms and equipme(...)

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

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

People   cross the border between Hungary and Austria on September 10th, 2015, near Nickelsdorf, Austria. The US has made its first specific commitment  towards increasing its acceptance of migrants from Syria.  Photograph: Joe Klamar/AFP/Getty Images

US president Barack Obama has directed his administration to take in at least 10,000 people fleeing the conflict in Syria over the next year. White Ho(...)

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(...)