Former U.S. Ambassador to Ukraine Marie Yovanovitch testified Friday before House impeachment investigators in the second hearing of the public phase of the investigation into whether President Trump abused the power of his office.

At issue is whether he tried to extort Ukraine into conducting an investigation into his political rivals in exchange for $391 million in military aid.

During the morning session, Yovanovitch testified she felt threatened and intimidated by Trump.

Watch the proceedings live: