Months before Donald Trump blew up American politics with his surprise win in November, he did the same thing to the conservative media. Through much of the campaign, two very different media moguls with colliding visions for the Republican Party vied for Trump’s soul: Roger Ailes, the longtime president and CEO of Fox News, and Steve Bannon, the executive chairman of the populist online tabloid Breitbart. Both were angling to be the media Svengali whispering in Trump’s ear.

At one point, it seemed they might have been allies: Bannon worked to insinuate himself at Fox, and Ailes’ network aired some of his populist documentaries. Then came the first Republican primary debate in August 2015, when Megyn Kelly, Fox’s feisty prime-time anchor, hammered the candidate from all sides. It was at that moment that Bannon says his relationship with Ailes began to sour. “The big rift between Breitbart and Fox was all over Megyn Kelly. She was all over Trump nonstop,” Bannon said in an interview. He says he warned Ailes that Kelly would betray him. “I told him then, I said, ‘She’s the devil, and she will turn on you.’”