Taiwan is arguably America’s defining foreign-policy challenge. The calibrated ambiguity over whether the US would defend the island democracy from a Chinese attack is hard to sustain as China’s power grows. Would the US go to war over Taiwan?

The Economist's Beijing bureau chief David Rennie assesses the likelihood of a Chinese attack on Taiwan. We look back at the origins of America’s ambiguous Taiwan policy. And Anton La Guardia, our diplomatic editor, spots Washington doves. 

The Economist's US editor John Prideaux hosts with Jon Fasman, US digital editor and New York Bureau Chief Charlotte Howard. 

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