Article continues below advertisementDonald Trump left people scratching their heads again after his latest speech.On Wednesday, September 17, the president attended a state dinner at Windsor Castle with King Charles III, where he stumbled through remarks and made some eyebrow-raising claims about U.S. history.Article continues below advertisementSource: MEGADonald Trump claimed he was the first U.S. president welcomed to Windsor Castle.Article continues below advertisement"It's a singular privilege to be the first American president welcomed here," Trump began.