The European Union is putting tariffs on a range of products from the United States in retaliation to President Trump’s steel and aluminum tariffs, and items that come from Republican-held states rank high on the hit list.

The European Union plans to institute the tariffs in two phases: The first wave will take hold on April 1, and will impact goods that already had tariffs applied during Mr. Trump’s first term, such as bourbon, boats and motorcycles. For certain products like whiskey and Harley-Davidson motorcycles, those tariffs would be as much as a crushing 50 percent.

The second wave is still being figured out, though the list of products that could be affected is already public — and is 99 pages long. In that phase, the E.U. is planning to add levies to goods worth about 18 billion euros, or 19.6 billion dollars, and is aiming for them to go into effect on April 13.

The proposed goods include:

Exactly what those tariffs will look like remains to be seen. For now, Europe is consulting consumers, companies and policymakers across the 27-nation bloc as it finalizes the list. Many of the potential targets are largely produced in Republican-held areas, such as crops from the Louisiana district that elected Mike Johnson, the House speaker, and livestock from Nebraska and Kansas.

The goal? Officials want to hit America where it hurts in order to force the United States to the negotiating table, while doing as little damage as possible to Europeans.