Forget the polls, ditch the data, and stop sending journalists to swing state diners to interview undecided voters: historian Allan Lichtman already knows who is going to win the US presidential election. "Harris will win," Lichtman confidently announces to AFP. He was speaking at his home in the leafy Washington suburb of Bethesda shortly after unveiling his much-discussed, once-every-four-years White House prediction, based on what he calls the "13 keys" method. Lichtman's predictions are based on a series of true-or-false propositions applied to the current presidential administration. If six or more of these "keys" are false, the election will go to the out-of-power challenger -- in this case, Republican candidate Donald Trump. IMAGES AND SOUNDBITES