You may not have heard of the hedge-fund magnate Robert Mercer, but he 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.

Plus: Tom Hayden finished a book on the antiwar movement of the 1960s before he died in October: Hell No: The Forgotten Power of the Vietnam Peace Movement. It’s out now from Yale University Press. Steve Wasserman, Tom’s editor and publisher, comments.

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