On What Really Matters, Walter Russell Mead discusses the possibility of a recession, the new Chinese railway in Africa, and how Donald Trump’s approach to Vladimir Putin compares with Franklin D. Roosevelt’s to Joseph Stalin and Richard Nixon’s to Leonid Brezhnev.

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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)