Trump threatened a 200% tariff on John Deere if it moves manufacturing to Mexico.Win McNamee/GettyTrump threatened a 200% tariff on John Deere if it moves some of its manufacturing to Mexico.Experts say the tariff would harm US-Mexico relations, cost consumers, and may not even be feasible.John Deere first announced plans to move some of its production to Mexico in June following layoffs.Donald Trump has lodged a hefty threat against John Deere: move manufacturing to Mexico, and your imported products will face a 200% tariff.Now, trade economists say Trump's latest trade threat makes no sense.On Monday, the former president said at an agricultural policy roundtable in Smithton, Pennsylvania, that he would impose the massive tariff if John Deere follows through on its plans to move some of its production — specifically, skid steer loaders and compact track loaders — from Iowa to Mexico by the end of 2026.The company first announced the partial production shift to Mexico back in June, following several rounds of staff cuts.