Hillary Clinton calls Donald Trump a 'loose cannon,' risky president

US Democratic presidential candidate Hillary Clinton said on Wednesday the United States should not take a risk on an unreliable candidate like Republican Donald Trump.

"He is a loose cannon and loose cannons tend to misfire," Clinton said in an interview with CNN, citing what she said was Trump's claim that climate change was a Chinese hoax.

Clinton, who is front-runner to win the Democratic nomination, said Trump, the presumptive Republican nominee, would have to offer policy specifics in the general election on Nov. 8 and that she knows how to run against him.