Leading economist teaches Europe how to cripple Trump

The leading French economist Gabriel Zucman is urging European governments to inflict financial pain on American billionaires in response to US President Donald Trump’s effort to seize control of Greenland, a mineral-rich island that some of Trump’s rich campaign donors see as a potentially massive profit opportunity.

“Europe should respond to Trump’s blackmail with targeted measures aimed not at American consumers, but at American billionaires,” Zucman wrote in a post on his Substack. “Access...