Key moments as Republican contenders take part in second live TV debate

Republican contenders for the US presidency have been taking part in their second live TV debate.

The businesswoman Carly Fiorina rebuked Mr Trump for his recent comment that voters might not back her because of her looks.

Fifteen Republican candidates are hoping to be the party's White House nominee in 2016.

Going into the debate, the outspoken billionaire Donald Trump was still ahead in the polls, but he came under attack from all sides.