The United States imposed sanctions on a senior member of the Hungarian government for alleged corruption, the U.S. Treasury said on Tuesday, a move Budapest said it would challenge when President-elect Donald Trump takes power.

By Tamas Csonka The US has sanctioned Antal Rogan, a close ally of Hungarian Prime Minister Viktor Orban, for his alleged leading role in systemic public corruption in Hungary, outgoing US Ambassador David Pressman informed local media at an extraordinary press conference on January 7.

The U.S. Treasury Department’s Office of Foreign Assets Control (OFAC) imposed sanctions on Jan. 7 against Antal Rogan, a senior Hungarian government official and close associate of Prime Minister Viktor Orban.

On Tuesday, a top Hungarian government official and adviser to Prime Minister Viktor Orban was sanctioned for alleged corrupt activity by the United States, according to the U.S. Department of State.

The United States announced sanctions against the head of Hungarian Prime Minister Viktor Orban's cabinet on Tuesday for his alleged involvement in corruption. "This systemic corruption Antal Rogan represents is affecting Hungary's decision-making on issues that impact the security of the United States of America and our allies,

The US has placed Viktor Orbán’s chief of staff under sanctions for alleged corruption, the highest-ranking Hungarian official to be blacklisted since the fall of Communism. Antal Rogán, a longtime ally of the Hungarian prime minister overseeing state-owned media and part of the intelligence services,