'I explained to him - I said, "Don’t you ever call me something like that,"' Obama said in an interview with Bruce Springsteen.

'A great, great man and the world is better because Herman Cain walked on this planet and spread his love and his joy,' Huckabee said.

The documentary film 'From Poor to CEO: The Incredible Journey of Herman Cain' chronicles the life of the conservative icon.

'When I met him, I just got to find out more and more about his story, because he was such a humble man,' director Barry Tolli said.

The film uses a mixture of archival footage, animations, interviews and footage of visits to the locations that were key in Cain's life.