Left: Gordon Sondland, the U.S ambassador to the European Union, is sworn in before testifying to the House Intelligence Committee on Nov. 20, 2019. Right: Lt. Col. Alexander Vindman takes the oath before he testifies before the House Intelligence Committee on Nov. 19, 2019.

Left: Gordon Sondland, the U.S ambassador to the European Union, is sworn in before testifying to the House Intelligence Committee on Nov. 20, 2019. Right: Lt. Col. Alexander Vindman takes the oath before he testifies before the House Intelligence Committee on Nov. 19, 2019.