Secretary of State Mike Pompeo insisted that rooting out corruption in Ukraine has been a hallmark of official U.S. policy in Europe as a congressional investigation into relations between the two countries hangs over the department.

“We had a very clear policy with respect to Ukraine, and we executed it successfully,” Pompeo said Tuesday during a briefing with reporters. “There are still many challenges. Still have Russians in the Donbass. We still have the president in Ukraine working to make sure we move through the challenges the country has had with corruption for an awfully long time now.”