Professor Keith Whittington discusses his initial reaction to the Senate's departure from historical precedent in the lack of impeachment witnesses with NBC.

He has since spoken with NPR's Sarah McCammon on All Things Considered about the long term impact on similar proceedings in the future.

Whittington anticipated the decision not to call witnesses a piece he wrote with Ira Goldman for The Washington Post People who want Chief Justice Roberts to call witnesses should prepare for disappointment.