The Trump administration has proposed placing tariffs on an additional $4 billion of imports from the European Union, including cherries, whiskey and coiled copper, in a further escalation of a 14-year fight over government aid for aviation companies.

The United States had previously identified European imports worth $21 billion a year for potential tariffs in retaliation for Europe’s subsidies for Airbus. On Monday, the administration added dozens of products to the list “in response to public comments and additional analysis,” according to the United States trade representative’s office.

The United States is awaiting the World Trade Organization’s approval before imposing tariffs on the initial list of products. The items added Monday would be subject to a public hearing.

The European Commission declined to comment on what it described as an internal United States procedure, but it said in an emailed statement that “the figures quoted by the U.S.T.R. are based on U.S. estimates that have not been awarded by the W.T.O.”