European Council President Charles Michel, left, speaks with author of the High-Level Report on the future of the Single Market, Enrico Letta, as they arrive for an EU summit in Brussels, Thursday, April 18, 2024. European Union leaders vowed on Wednesday to ramp up sanctions against Iran as concern grows that Tehran's unprecedented attack on Israel could fuel a wider war in the Middle East. (AP Photo/Omar Havana)
European Council President Charles Michel, right, speaks with author of the High-Level Report on the future of the Single Market, Enrico Letta, as they arrive for an EU summit in Brussels, Thursday, April 18, 2024. European Union leaders vowed on Wednesday to ramp up sanctions against Iran as concern grows that Tehran's unprecedented attack on Israel could fuel a wider war in the Middle East. (AP Photo/Omar Havana)
European Council President Charles Michel, right, speaks with author of the High-Level Report on the future of the Single Market, Enrico Letta as they arrive for an EU summit in Brussels, Thursday, April 18, 2024. European Union leaders vowed on Wednesday to ramp up sanctions against Iran as concern grows that Tehran's unprecedented attack on Israel could fuel a wider war in the Middle East. (AP Photo/Omar Havana)
Author of the High-Level Report on the future of the Single Market Enrico Letta, left, speaks with Finland's Prime Minister Petteri Orpo during a round table meeting at an EU summit in Brussels, Thursday, April 18, 2024. European Union leaders vowed on Wednesday to ramp up sanctions against Iran as concern grows that Tehran's unprecedented attack on Israel could fuel a wider war in the Middle East. (AP Photo/Omar Havana)
European Council President Charles Michel, right, speaks with author of the High-Level Report on the future of the Single Market, Enrico Letta, as they arrive for an EU summit in Brussels, Thursday, April 18, 2024. European Union leaders vowed on Wednesday to ramp up sanctions against Iran as concern grows that Tehran's unprecedented attack on Israel could fuel a wider war in the Middle East. (AP Photo/Omar Havana)
From left, Estonia's Prime Minister Kaja Kallas, Belgium's Prime Minister Alexander De Croo, European Council President Charles Michel, European Commission President Ursula von der Leyen, Greece's Prime Minister Kyriakos Mitsotakis, author of the High-Level Report on the future of the Single Market Enrico Letta and Finland's Prime Minister Petteri Orpo speak during a round table meeting at an EU summit in Brussels, Thursday, April 18, 2024. (AP Photo/Omar Havana)
From left, Belgium's Prime Minister Alexander De Croo, Estonia's Prime Minister Kaja Kallas, European Council President Charles Michel, European Commission President Ursula von der Leyen, author of the High-Level Report on the future of the Single Market Enrico Letta and Greece's Prime Minister Kyriakos Mitsotakis speak during a round table meeting at an EU summit in Brussels, Thursday, April 18, 2024. European Union leaders vowed on Wednesday to ramp up sanctions against Iran as concern grows that Tehran's unprecedented attack on Israel could fuel a wider war in the Middle East. (AP Photo/Omar Havana)
From left, Luxembourg's Prime Minister Luc Frieden, Greece's Prime Minister Kyriakos Mitsotakis, European Council President Charles Michel, author of the High-Level Report on the future of the Single Market Enrico Letta, European Commission President Ursula von der Leyen and Finland's Prime Minister Petteri Orpo speak during a round table meeting at an EU summit in Brussels, Thursday, April 18, 2024. European Union leaders vowed on Wednesday to ramp up sanctions against Iran as concern grows that Tehran's unprecedented attack on Israel could fuel a wider war in the Middle East. (AP Photo/Omar Havana)