A professor who developed a model which successfully predicted all but one presidential election result for the past 100 years has claimed Donald Trump will win the election.

Professor Helmut Norpoth, of New York’s SUNY Stony Brook University, said the Republican candidate was likely to triumph in two weeks time because he was the strongest candidate in the primaries.

The political scientist developed a model which, when applied retroactively, accurately predicted every presidential election since 1912 – with the exception of the 2000 election, when it said Democratic candidate Al Gore would win.

Donald Trump calls US leaders 'stupid' and mocks 'tough guy' Joe Biden

Mr Gore won the popular vote, but following a disputde result in Florida, George W Bush was awarded more votes in the Electoral College and thus won the election.

The model suggests that the candidate who performs better in their parties primary race will go on to win the presidency.

“The model predicted a Trump win in February and nothing has changed since then. Whatever happens in the real world doesn’t affect the model”.

However, the model does not take into account the changing political landscape.

Every woman to make sexual assault claims against Donald Trump Show all 16 1 /16 Every woman to make sexual assault claims against Donald Trump Every woman to make sexual assault claims against Donald Trump E Jean Carroll Author Carroll alleges that Trump pinned her against a wall and forced himself upon her in the changing rooms of a Manhattan department store in the mid-90s Getty Every woman to make sexual assault claims against Donald Trump Kristin Anderson Anderson alleges that Mr Trump touched her genitals while at a club in the early 1990s Every woman to make sexual assault claims against Donald Trump Jessica Leeds Leeds told the New York Times that Mr Trump groped her on an airplane in the 1980s BBC Every woman to make sexual assault claims against Donald Trump Natasha Stoynoff Stoynoff alleged that Mr Trump forcefully kissed her before an interview at his Mar-A-Lago estate in 2005 Everipedia Every woman to make sexual assault claims against Donald Trump Karena Virginia Virginia alleges Mr Trump groped her in 1998 outside of the US Open tennis tournament BBC News Every woman to make sexual assault claims against Donald Trump Temple Taggart Taggart claims Mr Trump gave her a kiss without consent during a rehearsal for a 1997 Miss USA pageant Every woman to make sexual assault claims against Donald Trump Summer Zervos The former Apprentice contestant alleged that Mr Trump kissed and groped her at a Beverly Hills hotel in 2007 Every woman to make sexual assault claims against Donald Trump Alva Johnson A former staffer for Trump's campaign, Johnson alleges that Trump forcibly tried to kiss her after a rally in August 2016 MSNBC Every woman to make sexual assault claims against Donald Trump Jennifer Murphy The former Apprentice contestant said Mr Trump "surprise kissed" her - but she said it did not bother her Every woman to make sexual assault claims against Donald Trump Jill Harth The makeup artist accused Mr Trump of "attempted rape" while in his daughter's room in 1997 Every woman to make sexual assault claims against Donald Trump Mindy McGillivray McGillivray alleges Mr Trump groped her at Mar-A-Lago in 2013 AP Every woman to make sexual assault claims against Donald Trump Rachel Crooks Crooks says that kissed her on the cheeks and mouth when she introduced herself to him in 2005 Every woman to make sexual assault claims against Donald Trump Mindy McGillivray McGillivray claims that Trump grabbed her backside at Mar-a-Lago in 2006 CNN Every woman to make sexual assault claims against Donald Trump Cassandra Searles The former Miss Washington alleges that Trump repeatedly grabbed her backside and invited her to his hotel room Getty Every woman to make sexual assault claims against Donald Trump Jessica Drake Drake claims that when she and two other women arrived to Trump's hotel room at his invitation, he arrived at the door in pyjamas and tightly hugged and kissed each of the woman without permission Getty Every woman to make sexual assault claims against Donald Trump Ninni Laaksonen The former Miss Finland claims that Trump squeezed her behind before they appeared together on the Late Show with David Letterman in 2006 EPA

The model does not consider how events influence the later stages of the race or the fact that the two parties are less and less representative of the country at large.

Increasingly important voter demographics – such as women and ethnic minorities – are peceived to be more likely to back the Democrats and white men more likely to back the Republicans.

The Trump campaign has been severely damaged by the revelation of a tape earlier this month, where the former reality star is heard bragging about sexually assaulting women and getting away with it because he is a “star”.

Further allegations by at least a dozen women that he sexually assaulted them – some of whom allege that the incident happened during his marriage to current wife Melania – have lead to many mainstream Republicans distancing themselves from him and a further drop in the polls.

Donald Trump poses with employees of his National Doral golf club near Miami as he tries to win over the battleground state (AP) ((AP))

Similarly, although Mr Trump polls highly among white working class men who have perhaps lost out on globalisation, he performs poorly among college educated women and ethnic minorities.

Non-college educated women are also less enamoured of the Republican than their male counterparts, according to the Brookings Institute.

A state by state breakdown from Nate Silver, the pollster who correctly predicted how all 50 states voted in 2012, showed Mr Trump losing the key swing state of Florida – which has been so crucial to presidential fortunes in the past and has a large Hispanic population.

Even Ohio, another swing state with a large proportion of Mr Trump’s white working class base, looks like a toss up, with Mr Silver predicting Hillary Clinton’s chances of winning its 18 electoral votes at 54.3 per cent.

Overall, his 2016 election forecast predicts Ms Clinton has an 85 per cent chance of winning.

A poll which has predicted the result of the last three presidential elections, the Investor’s Business Daily/TIPP tracking poll, currently has Mr Trump at two points but this is within the margin of error.