Which adviser to the Donald Trump campaign had a biographical book about them written by Gabriel Sherman?
The Loudest Voice in the Room: The Loudest Voice in the Room: How the Brilliant, Bombastic Roger Ailes Built Fox News - and Divided a Country is a 2014 biographical book about Fox News Channel president Roger Ailes written by Gabriel Sherman. Roger Ailes:  In 2016, after he left Fox News, he became an adviser to the Donald Trump campaign, where he assisted with debate preparation.
Roger Ailes