In the escalating trade war with the United States, European officials are discussing imposing barriers on imports of U.S. services with a trade weapon that could allow the bloc to place restrictions on Big Tech and Wall Street.

“We have the power to push back,” Ursula von der Leyen, the European Commission president, said this week.

President Trump has already announced tariffs on aluminum, steel, cars and auto parts, moves that could seriously hobble the bloc’s shaky economy. Brussels has responded by announcing that it would reimpose levies on U.S. imports like Harley-Davidson motorcycles, whiskey and other goods, some of which were targeted during the trans-Atlantic clash Mr. Trump instigated in his first term.

To counter Mr. Trump’s latest reciprocal tariffs, European officials are weighing deploying a policy tool called the anti-coercion instrument, which some refer to as a “bazooka.” The instrument, which was adopted in 2023 to hit back at China but

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