Giuliani’s letter caused significant ripples in Romania and raised questions about his decision to work for foreign clients while serving as one of Trump’s chief attorneys dealing with the Russia investigation.

It also put him in opposition with the State Department, which has supported efforts to prosecute corruption in Romania. The United States joined with 11 other countries in June in a statement warning Romania not to take measures that would weaken its “ability to fight crime or corruption.”

Giuliani received a call from State Department officials this week about his letter, he said in an interview Wednesday.