Despite their many differences, Democratic presidential candidate Bernie Sanders and Republican presidential candidate Donald Trump are “delusional” on international trade policy.

So say Will Marshall, president of the liberal Progressive Policy Institute, and Ed Gerwin, a senior fellow there. In an op-ed for The Daily Beast, Marshall and Gerwin criticize Sanders and Trump on trade: “Their proposed fix — shredding international treaties and walling off the U.S. economy — is a textbook formula for economic stagnation… it won’t be the ‘one percent’ who suffer if the populists get their way; it will be U.S. companies with global supply chains and millions of middle-class American workers and consumers.”