Bruce Ackerman writes:

On Wednesday, the Washington Post reported on a closed-door session among Senate Republicans discussing the way they should conduct a trial if President Donald Trump is impeached by the House. According to at least one senator, Senate Majority Leader Mitch McConnell indicated that he is aiming for a rapid process that might start around Thanksgiving and end by Christmas. There are many reasons, though, to think that such a rush to judgment will fail.

The Constitution explicitly states that the chief justice, in this case John Roberts, “shall preside” over presidential impeachment trials. The rules of the Senate, moreover, require McConnell to take this command seriously. In order to prevent the vice president, who formally presides over the Senate, from refusing to allow the chief justice to play his constitutional role, the Senate rules governing impeachment require the vice president to swear in the chief justice immediately after the House’s charges are announced on the floor. The rules then explicitly empower the chief justice to “direct all the forms of proceedings” during the trial. The Senate, in contrast, is granted the “power to enforce obedience” to all these rulings.

This separation of powers between the chief justice and the Senate was at the center of public attention as the country prepared itself for the impeachment trial of President Andrew Johnson, which began on March 4, 1868. At that time, the Senate approved the rules that were later codified and remain in force today. As the New York Times reported on March 3, 1868, Sen. George Williams of Oregon argued “that the intention of the Constitution was to empower the Chief Justice to decide questions … as he would in any court as its presiding officer. To do otherwise would be to act with a sort of jealousy and make him a sort of figure head.” Sen. John Sherman of Ohio agreed that “the usage of all bodies [is] to submit such questions to the presiding officer.” [Continue reading…]