"As important as Mercer’s business investments is his hiring of advisers. Years before he started supporting Trump, he began funding several conservative activists, including Steve Bannon; as far back as 2012, Bannon was the Mercers’ de-facto political adviser. Some people who have observed the Mercers’ political evolution worry that Bannon has become a Svengali to the whole family, exploiting its political inexperience and tapping its fortune to further his own ambitions. It was Bannon who urged the Mercers to invest in a data-analytics firm. He also encouraged the investment in Breitbart News, which was made through Gravitas Maximus, L.L.C., a front group that once had the same Long Island address as Renaissance Technologies. In an interview, Bannon praised the Mercers’ strategic approach: “The Mercers laid the groundwork for the Trump revolution. Irrefutably, when you look at donors during the past four years, they have had the single biggest impact of anybody, including the Kochs.”"
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