The judges unanimously rejected the former president’s appeal of an earlier ruling that ordered him and two of his adult children to testify in a civil investigation into his family business.
As lawmakers have embraced more than $50 billion to Kyiv within two months, they have largely refrained from raising concerns or questioning the Biden administration’s strategy.
The former president’s eldest son, who encouraged White House officials to pursue “multiple paths” to overturn his father’s election loss, is said to have agreed to appear voluntarily.