The hedge-fund magnate Robert Mercer was probably the most important backer of Trump for president. Jane Mayer of The New Yorker has the first in-depth report on this little-known figure and former Breitbart News funder.
Also: Is Trump like Nixon? Both won by exploiting the resentments of the white working class; both covered up crimes committed by their campaigns against the Democrats. But Rick Perlstein, author of the classic book 'Nixonland,' says the answer is no: Trump is not like Nixon.