White House contenders clash over foreign policy

Republican Donald Trump and Democrat Hillary Clinton traded wins with their chief rivals on Tuesday and attacked each other’s foreign policy views as the 2016 presidential contest turned into a clash over who could best deal with the threat of Islamic extremism.

While both frontrunners scored victories in the night’s biggest prize of Arizona, Democratic challenger Bernie Sanders won caucuses in Utah and Idaho and Republican Ted Cruz claimed his party’s caucuses in Utah.

The victories kept Mrs Clinton and Mr Trump from dominating another election night, but they both maintained a comfortable lead in the race for delegates who will choose each party’s nominee at national conventions in July.