The Mercers and Stephen Bannon: How a populist power base was funded and built
The Mercers approach is far different from that of other big donors. While better-known players such as the Koch brothers on the right and George Soros on the left focus on mobilizing activists and voters, the Mercers have exerted pressure on the political system by helping erect an alternative media ecosystem, whose storylines dominated the 2016 race.
Their alliance with Bannon provided fuel for the narrative that drove Trumps victory: that dangerous immigrants are ruining the country and corrupt power brokers are sabotaging Washington. The wealthy New York family and the former investment banker-turned-media executive collaborated on at least five ventures between 2011 and 2016, according to a Washington Post review of public filings and multiple people familiar with their relationship. The extent of their partnership has not previously been reported.
Through those projects, the Mercers and Bannon, now chief White House strategist, quietly built a power base aimed at sowing distrust of big government and eroding the dominance of the major news media. The Mercers provided the money, while Bannon, working in tandem with Rebekah, acted as business partner and political guide. The familys overarching strategy, according to people familiar with their giving, is to test various tactics to see which is most effective.
https://www.washingtonpost.com/graphics/politics/mercer-bannon/