US Democratic presidential candidate Bernie Sanders in Iowa: “A candidate who was originally thought to be the anointed candidate, to be the inevitable candidate, is now locked in a very difficult race here in Iowa and New Hampshire.” Photograph: Scott Morgan/Reuters

Losing ground in the polls in the first nominating state of Iowa, Democratic presidential frontrunner Hillary Clinton has gone on the attack against h(...)

 Protesters with puppet effigies of US Republican presidential candidates Donald Trump  and Marco Rubio during a protest  in Las Vegas, Nevada, US. Photograph: Mike Nelson

Republican candidates gather in Nevada on Tuesday night for the party’s fifth presidential debate and the first since the California terror attack tha(...)

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(...)

Donald Trump: “Without looking at the various polling data, it is obvious to anybody the hatred is beyond comprehension.” Photograph:  Saul Loeb/AFP/Getty Images

The frontrunner for the Republican presidential nomination has called for “a total and complete shutdown of Muslims entering the United States” until (...)

Rice is the staple food for about three billion people worldwide. Photograph: Erik De Castro/Reuters

Rice imported from some countries contains high levels of lead that could pose a health risk to children, researchers have claimed. (...)