Original sentence: In 2012, D'Souza released his film 2016: Obama's America, an anti-Obama polemic based on his 2010 book The Roots of Obama's Rage; the film is the second-highest-grossing political documentary-style film produced in the United States
Edited sentence: In 2012, D'Souza released his film 2016: Obama's America, an anti-Obama polemic based on his 2010 book The Roots of Obama's Rage; the film is the highest grossing conservative documentary of all time..