Chief Justice John Roberts: "We do not speak for the people. We speak for the Constitution. Our role is very clear. We are to interpret the Constitution and laws of the United States and ensure the political branches act within them. That job obviously requires independence from the political branches." He also says, "It's a small thing perhaps but it is a repeated reminder that as our newest colleague put it we do not sit on opposite sides of an aisle, we do not caucus in separate rooms, we do

WATCH: Supreme Court Chief Justice John Roberts is sworn in ahead of the Senate impeachment trial; subsequently, Roberts swore in 99 of 100 senators, who will be the jurors. https://cbsn.ws/30qQ1Zq | CBS Evening News