
Chief Justice of the US Supreme Court, John Roberts administered the oath to the Senators to do impartial justice.
In a hushed chamber, Supreme Court Chief Justice John Roberts, clad in a traditional black robe, raised his right hand as he was sworn in to preside over the trial. He then administered the oath to senators in turn, to convene the third court of impeachment in American history.
Roberts asked if they swore to deliver "impartial justice" according to the US Constitution, and 99 lawmakers one was absent responded in unison: "I do."