On February 16, the Justice Department indicted thirteen Russians for interfering in the 2016 US presidential election. Donald J. Trump was elected with the slightest of margins in the electoral college, while losing the popular vote by 2.9 million. The fundamental question is if he won thanks to collusion with the Kremlin.

Luke Harding, the Guardian’s veteran correspondent in Moscow, who was expelled by the Kremlin in 2011, has written an extraordinary investigation of this drama, Collusion: Secret Meetings, Dirty Money, and How Russia Helped Donald Trump Win (Vintage Press).

Read more here.