There have been documentaries, television programmes and "Saturday Night Live" comedy sketches, but this is the first film about one of the most divisive men of our times. "The Apprentice" tells of how Donald Trump rose to fame and power in 1980s New York before he became president of the United States. Directed by Iranian filmmaker Ali Abbasi, it stars Sebastian Stan as the young Trump. At its premiere at the Cannes Film Festival in May, it earned a standing ovation and threats of lawsuits from the Trump election campaign. The director sits down with culture editor Eve Jackson to discuss the challenges of making Donald Trump's origin story.