Donald Trump sensationally refused last night to commit to whether or not he would accept the result of the presidential election, threatening the American democratic process.

In the third and final presidential television debate, Mr Trump and his rival Hillary Clinton squared off in Las Vegas.

However, it was not the "Fight Night" that had been predicted beforehand. The debate was the most measured discussion of policy yet on issues such as abortion and gun control.

The main headline of the night, however, was the moment when the Republican nominee was asked by moderator Chris Wallace if he would accept the election result.

"I will tell you at the time. I'll keep you in suspense."