Catholic Law's Professor Antonio Perez was recently quoted in an OSV News article discussing the latest missile and drone attacks launched by Russia on Kyiv. The piece highlighted the urgent calls from Ukrainian Catholic leaders for international intervention to end Russia's war on Ukraine. Professor Perez underscored the United States' longstanding policy of rejecting territorial claims based on aggression and the U.S. political commitment in the Budapest Memorandum of 1994 to guarantee Ukraine’s territorial integrity in exchange for Ukraine’s agreement to give up its nuclear weapons.

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OSV News
Date: April 25, 2025
By: Kate Scanlon
Ukraine Catholic leader calls for world to stop Russia’s war as Trump pushes peace terms

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Antonio Fidel Perez, a professor at The Catholic University of America Columbus School of Law who studies foreign relations law, told OSV News, “Plainly, the president has the constitutional power to recognize foreign states — including their boundaries as part of that power — as the U.S. Supreme Court has made clear.”

“But the United States has previously and consistently refused to recognize territorial claims based on aggression, such as Russia’s unlawful invasion of Ukraine both in 2014, when it acquired control of Crimea, and beginning again in 2022,” he said.

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