'Chaos Candidate': Trump Attacked Over Muslim Ban Plans

Republican presidential contender Jeb Bush has sharply criticised frontrunner Donald Trump in a debate for proposing to ban Muslims from entering the United States, calling him a "chaos candidate" adept at delivering one-liners.

But candidates Marco Rubio and Ted Cruz refused to bash Trump on Tuesday for his controversial proposal, focusing their criticism on President Barack Obama and accusing him of failing to keep the US safe.