Cities are stepping up to address the world's thorniest challenges, from climate change to migration. Ian Bremmer sits down with three mayors from across the globe to talk about how their cities are taking on the world's most pressing problems. And on Puppet Regime, as Theresa May prepares to leave 10 Downing Street some old friends come by to see her off.

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U.S. President Donald Trump holds up a "Make Our Farmers Great Again" cap during a roundtable discussion on workforce development at Northeast Iowa Community College.

REUTERS/Joshua Roberts

Is US President Donald Trump going whole hog for the farm vote?

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How will artificial intelligence reshape the global workforce, and who will be ready for it? Speaking at the United Nations, Doreen Bogdan-Martin said the rapid growth of AI will transform jobs worldwide, making large-scale workforce training essential. “We’ve seen estimates that 170 million new jobs will be created; maybe 90 million jobs will be lost,” she said. “So how do we ensure that we’re prepared?”