On What Really Matters, Walter Russell Mead discusses the effect of President Donald Trump’s tariffs on Russia’s economy, Prime Minister Benjamin Netanyahu’s visit to the White House, and how tariffs are concentrating power in President Trump’s hands.

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The P4 laboratory, on the campus of the Wuhan Institute of Virology, in Wuhan, in China's central Hubei province. (Hector Retamal/AFP via Getty Images)