Reuters, Davos :”Unbelievable”, “embarrassing” even “dangerous” are some of the words the financial elite gathered at the World Economic Forum conference in the Swiss resort of Davos have been using to describe US Republican presidential frontrunner Donald Trump.Although some said they still expected his campaign to founder before his party picks its nominee for the November election many said it was no longer unthinkable that he could be the Republican candidate.Some noted that whatever the outcome, a heated campaign, which has also seen self-proclaimed Socialist Bernie Sanders provide a tough challenge to former Secretary of State Hillary Clinton for the Democratic nomination, could alter the US political environment, giving vent to new populist anger on both sides of the political divide.Trump’s nationalist rhetoric, particularly proposals to ban Muslims from entering the United States, tax goods made abroad and build a wall on the Mexican border, were never the sort of thing to appeal to the free trade crowd that typically gathers at events like the annual Davos economic forum.