The U.S. is suddenly looking less bubbly for European wines. President Donald Trump on Thursday threatened a 200% tariff on European wine, Champagne and spirits if the European Union goes forward with a planned 50% tariff on American whiskey.

Industry representatives warned that a 200 percent tax on European wines and spirits would halt shipments to the United States and wipe €4 billion off France’s trade balance.

Trump said he would impose the tariff if the European Union continues with its plan to impose a 50% tariff on whiskey beginning in April.