The European Union said it would impose tariffs against U.S. imports in retaliation for new American duties, measures the bloc has already indicated will target consumer, agricultural and steel products in many key Republican constituencies.

The Trump administration announced on Thursday that it would hit the EU, Canada and Mexico with 25 percent duties on imported steel and 10 percent on aluminum in Washington’s most aggressive trade action yet against its allies. The EU has said it will impose retaliatory tariffs on 2.8 billion euros ($3.3 billion) of American imports as soon as June 20.

“The U.S. now leaves us with no choice but to proceed with a WTO dispute settlement case and with the imposition of additional duties on a number of imports from the U.S.,” European Commission President Jean-Claude Juncker said in an emailed statement. “We will defend the Union’s interests, in full compliance with international trade law.”

Harley-Davidson Inc. and bourbon are both on the bloc’s list of goods that could be hit, pressuring Republican speaker of the House of Representatives Paul Ryan, who hails from the Wisconsin home of the motorcycle maker, and Senate Majority Leader Mitch McConnell, from Kentucky, where the whiskey is made.

National Security

Washington put its levies in place in the name of protecting national security, an assertion members of the EU have dismissed.

“We are deeply disappointed that the U.S. has decided to apply tariffs to steel and aluminum imports from the EU on national security grounds,” the U.K. government said in a statement. “We have made clear to the U.S. Government at the highest levels the importance of U.K. steel and aluminum to its businesses and defense projects.”

The dispute is likely to dominate a meeting of finance ministers from the Group of Seven nations in Canada. The U.S. has just slapped tariffs on five of it six counterparts, including the host.

Prime Minister Theresa May will raise the matter with Trump at a subsequent summit of G-7 leaders next week, also in Canada.

The U.S. tariffs are “fundamentally wrong and extremely dangerous,” according to Joachim Pfeiffer, a lawmaker in German Chancellor Angela Merkel’s Christian Democratic Union, who said the measure “threatens to start a spiral of protectionism.”

“President Donald Trump isn’t just lighting a spark—there is a danger that this decision could cause a serious fire,” Pfeiffer said in emailed statement