Context: The Chief Justice presides in the Senate during a president's impeachment trial. The rules of the Senate, however, generally do not grant much authority to the presiding officer. Thus, the Chief Justice's role in this regard is a limited one.

Question: Who presides over an impeachment trial?
Answer: The Chief Justice

Question: Where does the Chief Justice preside during a Senate impeachment trial?
Answer: Unanswerable

Question: Which rules grant much authority to the presiding officer?
Answer: Unanswerable

Question: Who has an unlimited role in this regard?
Answer: Unanswerable

Question: Where does the president preside during the Chief Justice impeachment trial?
Answer: Unanswerable

Question: Which rules do not grant authority to the President?
Answer: Unanswerable