Trump tries to discredit diplomat's impeachment testimony moments before it begins

President Trump is once again going after a witness in the impeachment inquiry on Twitter during their hearing, this time by trying to undermine diplomat David Holmes' testimony. Holmes is testifying in the fifth day of public impeachment hearings about having overheard a phone call between Trump and U.S. Ambassador to the European Union Gordon Sondland in July. He previously told Congress that he could hear Trump asking Sondland on the call if Ukraine was going to "do the investigation," with t...