Marie Yovanovitch described a pressure campaign to oust her from Kyiv. President Trump tweeted negatively about her during her hearing; Rep. Adam Schiff called it "witness intimidation."

The Ohio Republican fiercely defended President Trump, arguing that he has the right to involve his personal lawyer in diplomacy. Rudy Giuliani has become a key figure in the impeachment inquiry.

Acting U.S. Ambassador to Ukraine William Taylor and top State Department official George Kent testified in an open hearing Wednesday, the first of many to come in the impeachment inquiry.