Donald Trump has continued to call Mr Ailes a 'friend'.

Why Trump is the biggest risk to the world economy

While markets were concerned about Brexit, but they're facing a far bigger threat: The firebrand US presidential candidate. If he really did win power and enact some of his policies, the importance of "it's the economy, stupid" would reassert itself brutally quickly.

Support for Donald Trump among white males is falling.

The voters who may hold the key to a Trump victory

At the heart of Trump's election campaign there is a gamble that a risk-taking candidate can so demonise and offend black and brown voters that whites, especially the poorly educated, will rush to make him president.

Donald Trump has emerged from a disastrous week, and was supposed to be rebooting his campaign.

We have to consider that Trump is stupid

'It's the economy, stupid' was the slogan behind Bill Clinton's 1992 White House triumph; but in Campaign 2016 it's becoming more about stupid – and his name is Donald Trump.