Winston Churchill said of Russia that it was “a riddle, wrapped in a mystery, inside an enigma.” Today the same might be said of Russia's interference in the 2016 elections and the connection between that interference and the campaign of Donald Trump.

We know so much. Every day it seems new information is revealing itself. And yet we seem to be missing the rosetta stone that will enable us to explain it all. Perhaps Bob Mueller holds that. But until then, two time Pulitzer Prize-winning Washington Post reporter Greg Miller’s new book, The Apprentice: Trump, Russia and the Subversion of American Democracy, may not quite be that rosetta stone, but it’s as important a piece of codebreaking as we have so far.

My conversation with Greg Miller: