US Republicans spar in fiery debate

US Republicans have traded blows in a heated presidential debate in Colorado that featured several angry exchanges, reports BBC.

Frontrunners Donald Trump and Ben Carson, with no political experience, were under attack from the start.

Ohio Governor John Kasich condemned their "fantasy tax plans" and added: "We can`t elect someone who doesn`t know how to do the job."

Mr Carson, a retired neurosurgeon who has edged past Mr Trump in national polls, had a quiet night in Boulder.

His tax proposal, which is based on biblical tithes, was decried by Mr Kasich, who also dismissed Mr Trump`s plan to deport 11 million undocumented immigrants and build a wall on the Mexico border.