Mich. Comp. Laws § 6.7: Impeachment; trial, time, place, adjournment.

Sec. 7.

When issue shall be joined in an impeachment, the senate, sitting as a court for the trial of the same shall appoint a time and place for the trial thereof. At the time and place so appointed, the senate, as a court, shall proceed to hear, try and determine the impeachment, and may from time to time, if necessary, adjourn the trial to any other time or place at the state capital.