'Betting on Zero' documents the not-so-simple story of Ackman's attempts to short the nutrition company's stock.
And how will it affect businesses.
Despite bearing the presidential nominee's name, the casino has been owned by activist investor Carl Icahn since 2014.
Workers at the Trump Taj Mahal in Atlantic City are on strike and the casino threatens to shut down.
The out-spoken Apple investor said he sold his shares amid concerns over China's economic woes.