Historian Allan Lichtman who’s predicted 30 years of presidential elections correctly is doubling down on a Trump win

Last month, the man who's tried to turn vote prediction into a science predicted a Trump win.

Allan J. Lichtman, distinguished professor of history at American University, said Democrats would not be able to hold on to the White House.

In the intervening weeks, the campaign was rocked by a series of events. The release of the Access Hollywood tape obtained by The Washington Post was followed by accusations from a growing list of women of various improprieties on Trump's part, ranging from verbal abuse and harassment to outright sexual assault. Fix founder Chris Cillizza named Trump the winner of the inauspicious “Worst Week in Washington” award for four weeks running. At the same time, WikiLeaks released internal Clinton campaign emails, and the U.S. government flatly accused the Kremlin of being involved. And let's not forget those presidential debates.

So plenty has changed. But one thing hasn't: Lichtman, author of “Predicting the Next President: The Keys to the White House 2016,” is sticking with his prediction of a Trump victory.

If you aren't familiar with his somewhat unique prediction system, here are the basics: The keys to the White House, he says, are a set of 13 true/false statements. If six of them are false, the incumbent party loses the presidency. His system has correctly predicted the winner of the popular vote in every U.S. presidential election since 1984. Our first interview went into the keys more in-depth, and in September he said the keys were settled enough to make an official prediction of a Democratic loss and a Trump win. ...