Final vote in Trump impeachment trial will occur Wednesday. Closing arguments Monday
Democrats fail in bid to convince at least four GOP senators to join them in demanding witnesses in the trial.
Ledyard King and Maureen Groppe, USA TODAY
‘Impartial justice’: Can partisan senators serve as unbiased jurors in the Trump impeachment trial?
The oath is administered any time the Senate considers impeachment. Previous trials show lawmakers have used their own judgment to follow its intent.