The U.S. House of Representatives is holding open hearings in its impeachment inquiry into President Trump. Jennifer Williams, an aide to Vice President Mike Pence, and Lt. Col. Alexander Vindman, the director for European Affairs at the National Security Council, have been called to testify.
On Tuesday afternoon, Kurt Volker, the former US special envoy to Ukraine, and Tim Morrison, the former National Security Council official, are expected to testify. The GOP minority had requested that Volker and Morrison testify.
