Donald Trump on Thursday took another step towards conceding the US presidential election on Thursday when he said he would leave the White House if the electoral college certified Joe Biden as the winner of November's vote. But the US President repeated unsubstantiated claims of electoral fraud and refused to say if he would attend Mr Biden's inauguration on January 20. "It's going to be a very hard thing to concede because we know there was massive fraud," Mr Trump said at the White House on Thanksgiving. Asked if he would give up power if the electoral college, which is to vote on December 14, certified <a href="https://www.thenationalnews.com/world/the-americas/us-government-agencies-begin-transition-to-biden-as-trump-considers-pardons-1.1117917">Mr Biden's victory,</a> he said: "Certainly I will and you know that." Mr Trump angrily denounced officials in Georgia and Pennsylvania, <a href="https://www.thenationalnews.com/world/the-americas/pennsylvania-certifies-election-results-cementing-biden-s-victory-1.1117227">two key swing states that helped to give Mr Biden the win,</a> as "enemies of the state" and claimed they were culprits in vote fraud. State officials and international observers have repeatedly said no evidence of fraud exists and his campaign has repeatedly failed in court.