‘God help us’ – Robert De Niro compares Donald Trump to Travis Bickle from ‘Taxi Driver’

"God help us," De Niro said on Saturday at the 22nd Sarajevo Film Festival, when asked what he thought of Mr Trump's candidacy. Yet the actor is just one of many to have spoken out after a week in which the Republican candidate's campaign lurched into even more uncharted territory and sought to even question the very legitimacy of the election itself.